There are several artists called Riddle:

1) RIDDLE is a japanese roc… Read Full Bio ↴There are several artists called Riddle:

1) RIDDLE is a japanese rock band formed on May of 2003.
they longed for oversea bands...and they had first show on July.
in October　of 2003, they released 1st DEMO-CD.(sold 1,500 copies)
in April of 2005, they released 1st Mini Album 「soundview」from RX-RECORDS.
and they offered two new songs to RX-RECORDS V.A album .
in December of 2005, they released limited single(sold out!!) including "DREAMS COME TRUE" (famous Japanese group) cover song.
in February of 2006, they released 1st Album「butterfly effect」and has been sold over 8,000 copies in Japan.
they played with ANTI-FLAG, ELLEGARDEN, and they played at the independence-D twice.
they released 2nd Mini Album「Heart Out」in December of 2006.

Members

Takahiro - Vo&Gu
Shu-hei - Gu&Vo
Meshio - Ba&Cho
Shunscale - Dr&Cho

2) Riddle is a beat producer from Manchester, UK, delivering high-quality instrumental hip-hop. He is also one-third of the hip-hop collective Higher ProspectZ.

His work can be found through SoundCloud or Bandcamp.

One By One
Riddle Lyrics

Jump to: Overall Meaning ↴ Line by Line Meaning ↴

I'll get by
As long as I have you
Though there be rain
And darkness too
I'll not complain
I'll see it through

Poverty

May come to me, it's true
But what care I
Say, I'll get by
As long as I have you.

But what care I

Say, I'll get by
As long as I have you.

Overall Meaning

These lyrics from Riddle's song One By One reflect the idea of resilience and perseverance in the face of hardship. The singer is expressing their assurance that they can get through anything as long as they have their loved one by their side. They acknowledge the existence of rain and darkness, symbolizing tough times, but they are determined to see it through without complaining. The next verse mentions poverty, perhaps alluding to financial struggles, but the singer remains unbothered by it as long as they have their loved one.

The overall tone of the lyrics is one of optimism and determination. The singer seems confident that they can overcome whatever obstacles come their way. The repetition of the phrase "But what care I" highlights this attitude - the singer is emphasizing that they don't care about the challenges they face because they know they can handle them.

One interesting fact about this song is that it was composed by Jule Styne, who was a prolific Broadway composer and collaborated with lyricists such as Stephen Sondheim and Sammy Cahn. Another interesting fact is that this song has been covered by many influential musicians, including Ella Fitzgerald and Nat King Cole. Additionally, the song was featured in the 1956 film "The Opposite Sex" and was performed by June Allyson.

The chords for One By One are as follows (in the key of C):

Verse:
C Cmaj7 Dm7 G7
C Cmaj7 Dm7 G7
C Cmaj7 Dm7 G7
C Cmaj7 Dm7 G7

Chorus:
C C7 F A7
Dm7 G7 C G/B
Am7 D7 G7
C Cmaj7 Dm7 G7

Line by Line Meaning

I'll get by
I will manage to survive

As long as I have you
If I have you by my side, then I can face anything

Though there be rain
Even if there are difficulties and hardships

And darkness too
And even if everything seems bleak

I'll not complain
I won't whine or grumble about my problems

I'll see it through
I will persevere and make it to the other side

Poverty
The state of being poor or lacking necessities

May come to me, it's true
It is possible that I may experience poverty

But what care I
But I don't really care

Say, I'll get by
Because I know that as long as I have you, I will be okay

As long as I have you.
Once again, emphasizing the importance of having the person they love by their side

Lyrics © Peermusic Publishing
Written by: Fred Ahlert, Roy Turk

Lyrics Licensed & Provided by LyricFind

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Most interesting comments from YouTube:

Magic Gonads

8y↑4

The best solution I've seen in the comments so far is "If I had asked you earlier, which door would you say leads to paradise/death" It will always result in the guard telling you which one leads to the door you asked for, as the liar will negate his previous lie when trying to lie about what he would have said.This solution does not require that either guard know anything about the other guard, but only which door that he is standing behind.

But, to make it more challenging I think the guards should only be able to agree or disagree with a statement, instead of answering a question.

Also let us strictly define the liar and the truth teller:

The liar will respond with agreement to a statement he disagrees with, and respond with disagreement to a statement he agrees with.
The truth teller will respond with agreement to a statement he agrees with, and respond with disagreement to a statement he disagrees with.

By these definitions, it acknowledges the fact that neither guard are omniscient (instead of "the truth teller always tells the truth" which implies that anything he says is objectively true and thus he must be omniscient (or omnipotent so he changes reality to fit his statements)). And the liar cannot manipulate his statement so that he doesn't tell the truth, but simply negate his actual answer.

Are there any solutions now? I thought about this for a while and I only really got Yes/No/No/No spreads for all the possibilities of an answer.

Also, there are some other cases to consider in this new puzzle:

Should the guards respond with disagreement or agreement if they don't know the answer? (Though that's unlikely to make inconclusive solutions conclusive).

You may pack your statement with multiple conditions, so it evaluates to a single condition but is essentially the ALL operator on a list of conditional statements (I used this for the crux of my attempted solutions). But you could also use the ANY operator or, really any sort of operator you want, by modifying the statement to have a statement inbuilt in it, for instance: "Of the statements, "You are a guard" and "You are standing in front of the door to paradise." and "you are...", an odd number of them are true" instead of "(You are a guard XOR you are standing in front of the door to paradise) XOR you are..."

Also something to consider, stating "I will die if I enter the door you would suggest is the door to paradise", ignoring that it wouldn't actually give you which door you should enter, it also wouldn't work because the guards can only agree or disagree, so they cannot evaluate an answer to a question they would have given since they cannot answer questions.
But maybe that's something you could allow in the problem.

Can you accept an answer if it results in a conclusive outcome most of the time (or a specific, arbitrary accuracy)?
If using a modulo system with a bunch of different conditions, if the answer itself can be sourced from different outcomes but trusting that answer will lead to success a sufficient percentage of the time, can it be considered a solution?
(Let's say that an answer gives you a conclusive answer 75% of the time, is it worth risking your life on?)

WestFactor

8y↑4

+DrGerbils Hello! I apologize for the late response. Thanks for the great comment. You actually bring up something that I considered regarding this puzzle. When I did the video, I had to decide on the solution to use, and that was mostly based on what I thought would be easiest to understand and explain (from talking to different people). But I considered that the other approaches, using a "yes/no" challenge, might do a better job of limiting the responses.

However, I thought about the very thing you are describing and realized that, in theory, any standard solution exposes itself to nebulous responses by the liar. It's so funny you mention this, because I again considered this very point just the other day. Saying "Neither" is a great example in this version, and "I don't know" could apply in any variation. I thought about a guard answering in a way that didn't clearly identify one door, which cripples this solution. And an approach based on a yes or no answer, could be met with possibly/maybe or, as you said, "I don't know." The guard could even say things like "if you're lucky" just to be a jerk ... lol.

For example, the approach of "If I asked the other guard if your door leads to paradise, would he say yes?" That's really trying to force a binary response. As long as each guard answers consistently, we're fine. If the liar, instead of saying yes or no, says he doesn't know, then we have problems. We know he's the liar, (or even the honest guard trying to reflect crazy answers used by the liar) but choosing the correct door was based on the assumption that the liar would always key off of the honest guard's answer in a binary fashion. Without that, we can't tap into the truth regarding the doors, and it's really no better than just asking a guard directly.

This point is the one thing that troubles me about this riddle. But it's probably as you said; the question itself can combat this, in exchange for making the solution murky.

Thanks for commenting on this!

ali mahan

Ask either gaurd what would the other gaurd tell me is the door to life, then go through the oposite door.

proof is ,
minus into pluse minus

suppose
lier is minus( negative)
and true is plus (positive)
when you ask a one about another then
-*+ is equal to -(minus)

practically approved

cazinger

8y↑2

I came up with a lightly different question, but it works along the same principles.

I would ask: "Is the lying guard guarding the door leading to death?"

If you ask that question to the truth telling guard, and he answers "Yes", then that means that the truth telling guard is guarding the portal to paradise and you take his door (the door of the guard you asked the question of).

If you ask that question to the lying guard, and he answers "Yes", then that means that the lying guard is actually guarding the door to paradise and you take his door (again - the door of the guard you asked the question of).

If you ask that question to the truth telling guard, and he answers "No", then that means that the truth telling guard is guarding the door to death and you take the opposite door (the door of the guard you didn't ask the question of).

If you ask that question to the lying guard, and he answers "No", then that means that the lying guard is actually guarding the door to death and you take the opposite door (again - the door of the guard you didn't ask the question of).

So a "Yes" answer means you take that door and a "No" answer means you take the other door. But like I said, it is pretty much the same question as in the video, just phrased a little differently.

risgüey karaya

Noooooo.

If you ask “does the guard of truth guard the portal to paradise” to even one of them, no matter which, he could say something to the effect of “every other Wednesday” , or “sometimes”.

And if that happens, even if you get the correct answer from the guard of truth, considering you don’t have a straight forward answer from the guard of falsehood, there’s no way to know definitively which one of them is the liar.

The converse is also true.

The question has to be very specific with no space for loop holes.

The riddle never says the guard who lies has to give you a flat out lie.

It just says that he is a liar.

ShikasiXMS

Isn't there another option where you hypothetically refer to a guard that's a copy of the one you're questioning and ask whether they would say this door leads to freedom?
So basically all possibilities are:

You ask the truth-teller:
1. You refer to the door to freedom; their copy would say YES, so the original would also say YES. Thus this leads to freedom.
2. You refer to the door to death; their copy would say NO, so the original would also say NO. Thus the other door leads to freedom.

You ask the liar:
1. You refer to the door to freedom; their copy would say NO, so the original would lie about that and say YES. Thus this door leads to freedom.
2. You refer to the door to death; their copy would say YES, so the original would lie about that and say NO. Thus the other door leads to freedom.

Ian Moldovan

7y↑4

Let's go thru the scenarios.

Paradise guarded by Truth. Death guarded by Lies.
Truth will say Yes because he does guard the door to paradise, Lies will of course lie and say No.
Guard that answers Yes leads to paradise.

Other way around:
Paradise guarded by Lies. Death guarded by Truth.
Truth will say No, because he is not guarding the door. Lies however will say Yes (because he himself is guarding the door).
The guard that answers Yes leads to paradise.

In both scenarios, you go with the guard that answers Yes.

ali mahan

dbfan2scfan

7y↑10

There is another solution to this problem which is the answer I came to.

Ask the guard:

Is exactly one of the following qualities true about you:
are you the truth teller OR are you guarding the door to life?

If the truther guards the door to life he must answer false since both qualities would be true about him (not only one).
If the lier guards the door to life, he must answer false since only one of the qualities are true about him and he always lies.

If the truther guards the door to death he must answer true since only one of the qualities would be true about him.
If the lier guards the door to death he must answer true since neither quality is true about him (not only one) and he always lies.

If the guard answered false, walk through the door, if they said true, walk through the other one...

Jordan Gabrielle

By asking one what the other would say, you're always going to invert the answer by including both of them, since one will lie. If you ask a question that only involves one or the other... well you end up with the fundamental problem, not knowing which information stream is effectively negated.

Notice that the question can also be asked as a negative to get the door you should walk though, "What portal would the other guard say is NOT the gateway to paradise".

And furthermore, "What portal would the other guard say that you would say is the gateway to paradise?", notice that this question will not suffice, not because it is too complicated, but because you are unevenly distributing the negation.

When asking one of the other...
0 lie -> 1 lie = 1 lie, binary flip in this case
1 lie -> 0 lie = 1 lie

When asking one of the other, of the original...
0 lie -> 1 lie -> 0 lie = 1 lie
1 lie -> 0 lie -> 1 lie = 2 lie

Same issue as originally, but instead of making unnecessary assumptions about if there are 0 or 1 lie, now 1 or 2.

Lastly, because this is kind of fun...

"What portal would the other guard say that you would say that the other guard would say is the gateway to paradise?"
0 lie -> 1 lie -> 0 lie -> 1 lie = 2 lie (or 0 w/ binary)
1 lie -> 0 lie -> 1 lie -> 0 lie = 2 lie (or 0 w/ binary)

In theory, this convoluted question gets you the correct door pointed out without asking a negative.
Hope it helps!

Jordan Gabrielle

Ok, also very interestingly, this overkill solution (the last one) should work whether or not both guards are liars, one of each, or none.

Original case already covered in OP:
Both Liars:
1 lie -> 1 lie -> 1 lie -> 1 lie = 4 lie (or 0 w/ binary)
1 lie -> 1 lie -> 1 lie -> 1 lie = 4 lie (or 0 w/ binary)

Both Truth:
0 lie -> 0 lie -> 0 lie -> 0 lie = 0 lie
0 lies...

Nifty.

tails55

7y↑1

Let's make this riddle harder: instead of our language, guards speak their own - there are "da" and "ya" words, one means "yes" and another means "no", but you don't know what word means what. Guards understand our language however. You still have 1 question, but it may be as complicated as you want. Answer is under "Read more". Sorry for bad English.

Choose one portal and ask one guardsman "Will another guardsman answer "ya" if I'll ask him "Does this portal lead to paradise?"?"
If answer is "da", portal leads to paradise, otherwise portal leads to death.

truth96130

4y↑3

This is the question you should ask--
"If I were here yesterday and I asked you (which door leads to life?)
which door would you have pointed to?
Truth Guard-
Points to the door of life.
Lying Guard-
He knows he would have pointed to the (door of death) there for
(he lies) and points to the door of life.
So with this question, they will both point to the door that leads to life.

Old’s Cool Gaming

7y↑4

This riddle is pretty tricky, but I know how to solve it.

Simply ask "If I were to asked the other guard which door is the correct door, what would he say?" Then choose the opposite of the answer he gives you.

Here's how it works:

The Lying guard would lie to you and say that the honest guard would choose the wrong door.

The Honest guard would tell you that the liar would choose the wrong door because that's the truth.

klandersen42

It doesn't matter if the guards know the nature of the other guard. One guard ALWAYS tells the TRUTH and the other ALWAYS LIES.

If you ask "which door is the paradise door" you won't know which guard is lying because they will point to both doors. The truth guard points to the true paradise door and the lying guard points to the death door.

By asking either guard "which door would your fellow guard say is the paradise door" you find out the nature of each.
Asking The Truth saying Guard which door the other guard would say is the paradise door, he would say the one that is the death door because the liar guard would try deceiving you by making you think the death door was the paradise door.
Asking the lying guard which door the other guard would say is the paradise door he would still indicate the death door because the truth guard would indicate the paradise door (if asked which is the paradise door) but since you are talking to the liar he will indicate the other door which is the death door because he couldn't indicate the real paradise door because by indicating the paradise door the lying guard would be telling the truth.

It is confusing but makes sense. If you try to read deeper into it then you get more confused.

All comments from YouTube:

Kyle Young

7y↑43

The key to understanding how this problem is solved is understanding that by asking a guard what the other one would say, you're basically filtering the answer through one liar and one truth-teller. You're guaranteeing that you're being lied to once and only once.

WestFactor

7y↑5

That's right. Sorry for the late reply to this! Thanks for watching and posting a great comment.

Mr Master Grimmbo

2y↑1

You really helped me understand this

The Azure

7y↑290

Thank you Yu-Gi-Oh for always making me remember that depending on who tells me the information for the riddle, I may have already been lied to.

Solonizer Solonizer

7y↑17

That's exactly what I was also thinking. Which is why Yu-Gi-Oh! was the best Anime until it became crap with all the battle shitty finals and after :/

WestFactor

7y↑22

Haha - I still haven't seen that episode. One thing I should mention is that in my version, I picture that some entity or mechanism (the narrator?) is giving the rules, not the guards. This is to avoid precisely that problem - lol. I agree that it's a major gotcha if the guard explains it. Thanks, guys!

straswa

7y↑2

I remember that episode, good point.

Dorgi2

PARADOX BROTHERS

8 More Replies...

Aldin Lewis

8y↑23

This is a neat twist to the classic, "one of us lies, and the other tells the truth" riddle. That said I find it funny that people missed the goal of the riddle, it doesn't matter if you know who tells the truth the goal is to find the right door. (Personally I couldn't think of an answer, but it's 2 in the morning for me so I'll give myself a pass)

WestFactor

8y↑1

Thank you! I've always loved this riddle, and wanted to render it in a sort of fantasy style. You're right about people thinking the goal is to spot the liar ... lol. I wish I had elaborated on that in the video. Most people miss the real goal of finding the right door, as you said. And I accept your pass! Aha ... thanks for commenting!

NXeta

8y↑390

Classic problem, but one thing to note though is that this answer assumes that the truth teller knows the other guard is a liar, and vice versa

Mikko Luttinen

8y↑17

Yes, this assumption is not trivially true or false, yet it is assumed to be true in the solution.

Quinnen Crawford

8y↑26

it said one always tells the truth, not what it assumed the truth was, and one always lied, not tell what it thought it wasn't the truth.

NXeta

8y↑12

@Quinnen Crawford, no what I mean is that the truth person Knows the other person is a liar, and the liar Knows the other person is a truth teller.
This is not specified in the problem, but our solution must assume it

Quinnen Crawford

oki

UTU49

8y↑18

Great point. This logic is only valid if the 2 guards know what each other do. It should be part of the set up of the question.

39 More Replies...

ᕋᒿᘝᘎᐦᕭ ᑫᘕᘝᘛᒿᘝ

3y↑1

This works because you are informed of the rules outside of the absolute truth/lies. If you are informed of the rules by both of the guards, then they are both able to lie or not. You are at a 50/50 for death and paradise depending on how you learn the rules.

Nick Calingo

2y↑4

This would've been so much easier if both guards have 'ties' to their own portals like in the Honesty or Liar Village where you just ask the old man or guard where he's from to which he'll always point to the Honesty Village. It adds a bigger variable that makes it easier to solve compared to this one. Such a wonderful and gear turning riddle.

Mach3Maelstrom

8y↑243

"If I were here yesterday and I asked you which door I should take, which door would you have pointed to?"

Truth Guard: Points to the correct door.
Lying Guard: Knows he would point to the wrong door, so he'd lie about which one he would point to. Points to the correct door.

WestFactor

8y↑34

Hi:) That's right. I discussed a similar solution in another comment, though I didn't get to cover it in the video. Though most people just assume the challenge is to reveal the liar ... lol. Great comment and thanks for watching!

ZeagaX13

8y↑34

How do you know the truth guard is telling you to go to paradise? Maybe he doesn't like people but tells the truth all the time. If he doesn't like people, you for instance, he'd tell you to go die in the death door.

You didn't ask for paradise or the "correct" door, you asked where they would send you.

What does the lying guard believe is the wrong door? Death could be the wrong door to take because death isn't a good thing, however you're not asking for the right door, but rather what door he would point too. If the lying guard wants you to live, he would point to death so you go to paradise. If the lying guard wants you to die, he would point to paradise, because you would think he's lying then choose the death door.

Then again that assumes you know which one tells the truth and which one lies as well as what doors the truth and liar guards actually guard, and you don't. So then you end up with absolutely useless information and was left to wonder... "Do these guards want me to live?"

risgüey karaya

6y↑2

This doesn’t solve it.

But I did!

Nate The Pnda

6y↑6

Wouldn't the death guard just point at his own portal?

nozomu

Fluffy _ Panda_Gaming, exactly lol

9 More Replies...

PurpleBox89

The art for these guards is awesome! Evokes some Metroid vibes.

Fooonix

7y↑8

assuming each guard is assigned to a gate, you can ask "does the liar's gate lead to death"
"Yes" means go through that gate, "No" means go through the other gate, 4 scenarios below

S1: You ask the liar guarding the death gate - he lies and says "No" so you go through the other gate
S2: You ask the liar guarding the paradise gate - he lies and says "Yes" so you go through his gate
S3: You ask the truth teller guarding the death gate - he truthfully and says "No" so you go through the other gate
S4: You ask the truth teller guarding the paradise gate - he truthfully says "Yes" so you go through his gate

WestFactor

That's right. This one has been used only a few times and it's a great approach. Thanks for commenting on this!

Ezra Phillips

8y↑4

Those guards look so badass! Really well drawn and animated!

WestFactor

Thank youuu, I appreciate that! :)

Ezra Phillips

8y↑1

WestFactor No problem!! Keep up the amazing work on those awesome animations!! X3

WestFactor

Bunny Wolpertinger Well now I have to make more - haha! :)

Ezra Phillips

You should!! XD

JapDaZomby

3y↑8

After so long this has FINALLY got me to understand this riddle. 😂

Innosyde

2y↑2

Here too. :)

Magic Gonads

8y↑4

WestFactor

I hate that I wasn't able to read this until now, and hope that you'll see this reply. This is a fantastic comment and I really appreciate the thinking that went into this. Great stuff! I actually feel bad that I am so late responding! Lol. You post reminds me of some discussions in the older comments focused on the various gotchas that can break standard solutions and how to avoid them. I like the logic behind the tweaks and the analysis for solving it. The solution you mentioned as the best one, is actually something I covered in the early comments, but I used the two-guard approach in the video purely for simplicity. I was worried that people would have trouble grasping the concept of the liar negating the first hypothetical lie into the truth. I felt they would see the solution as a wordier version of the direct question. So I decided to save any deeper discussions for the comments. But it probably wouldn't be any more confusing that the current solution, lol.

But these are very interesting thoughts and a fresh take on this riddle. I'll review this more in just a bit!

Magic Gonads

WestFactor It's quite the rabbit hole. I suspect that there aren't any 100% conclusive solutions for the new problem since you can't get them to answer the question for you, but there's probably some trickery yet to be seen.

Guardian Valor

2y↑1

I know I'm 5 years late, but why does asking earlier make any difference wahatsoever?

Mortis Malum

9y↑3

Awesome! I was trying to explain this riddle to my son and I think this video will help him get it :)

WestFactor

Thank you for commenting! For some reason, I didn't see this when you posted it. Weird notification problems. Anywhooo, glad you liked it! I'm flattered that someone actually watched it ... Lol. That's very cool about your son. :) If it doesn't make sense, feel free to blame me. Haha:)

Da Big G

3y↑1

There is another question you could ask: if someone else were to ask you which door to take, which door would you tell them to take. The liar would tell you to take the wrong door, but he would lie about which one he would tell someone else to take. The honest guard would tell you to take the correct door and would tell you the truth about that. Therefore, whichever door is indicated is the one you take.

Alpha Bulblax

8y↑311

The guards look a lot funnier if you imagine those are giant mouths instead of hoods.

רון סנדרוביץ

8y↑5

So true

WestFactor

7y↑32

lol Don't give Hollywood any ideas for the reboot.

Paul TheSkeptic

5y↑2

They're perpetually singing. "AAAAAAAAAAHHHHHHHHHHH"

Jame

You made my day

medall

69 likes won’t ruin it

5 More Replies...

Mark Fredrick Graves, Jr.

7y↑2

Sweet. This is my first time answering this type of riddle. Though I would've asked "If I ask the other guard if he guards the gate to paradise, what would he say?" And whoever answers yes, that's the gateway to paradise, if they say no, the other gate is the gateway to paradise.

WestFactor

Nice job! Yeah, it's pretty flexible with how you form the solution. Thanks for commenting!

Steve's Mathy Stuff

8y↑14

This is a classic puzzle, and presented very well. Your answer is one variant of the solutions accepted by Martin Gardner, Raymund Smullyan, et al. But consider the following.

The traveler has asked his question and, in case 1, he is talking to the truth teller. Over the previous few days (these are well traveled portals), the truthy guard has noticed that the liar has quit designating the wrong door, and has instead stated that neither door goes to Paradise, a perfectly good lie. So the only answer he can give is, "Neither." Case 2, the traveler is talking to the liar. The liar can answer with, "Neither", "I don't know", the expected "That door" while pointing at the wrong door, or probably many more useless responses.

The problem is that truth is not actually binary. There may be one truthful answer to a question, but multiple false ones.

I suspect there is a way to limit the guards' responses to eliminate the problem, but I'm not certain. If there is the elegant solution gets all ugly.

WestFactor

8y↑4

Roger França

8y↑2

+WestFactor That's a good solution. And I hadn't thought about all the possible lies he could say. And by the way, "If you're lucky"... Now that's a guard with a sadistic sense of humor.

WestFactor

+Roger França Lol That was something I considered for a while. If the guard gives crazy answers like that, the whole thing gets really wonky lol.

ali mahan

Code Factorial

8y↑1

This is the same riddle as in the Labyrinth, though as stated it's not guaranteed the guards know enough to answer the question properly.

You could ask, "Which portal would the other guard say is the gateway to paradise?" and the reply might be "I have no idea" and then you'd be out of luck. Maybe he doesn't know where the portals go, or he doesn't know if the other guard knows, or maybe he doesn't know if the other guard would tell a lie or not. Though I wonder, how could the liar dishonestly answer the question if he doesn't know the answer? I suppose he could randomly choose a door but what if he happened to choose the paradise one, is that really a lie??

WestFactor

Hi and thanks for commenting. Yep, I mentioned Labyrinth and other references in the description:) Great movie. I wanted to give a different solution in this one. Maybe you saw some of the other comments that discussed some of what you mentioned about holes in the logic and problems if the guards give nebulous answers? I'll be the first to admit things can get pretty tricky without making certain assumptions when solving this. I thought about your question regarding what the liar would dishonestly respond if he didn't know the answer. Maybe something like "The same door I would tell you if he tells the truth." So now I've given an answer to your question without knowing the other guard's response, and I'm lying despite not knowing with the bit about if he's honest (since I'm not). Very interesting question! I always feel that certain assumptions are needed for how the riddle was intended to work but they're still just assumptions and these are good questions to ask, hehe. Thanks for commenting!

Velja atte

8y↑10

you could ask one of the guards ''what door would the other guard say leads to paradise?'' in that case both guards will point the door that leads to death so you can pick the other door

WestFactor

8y↑2

That's right:) Thanks for taking time to watch and comment on this!

Old’s Cool Gaming

4y↑6

There are actually 2 correct answers for this riddle.

1. Ask a guard "If I were to ask the other guard which door is the correct door, what would he say?" Then chose the other door he points to.

2. Use Reverse Psychology by asking a guard "If I were to ask the other guard which door is the wrong door, what would he say?" The guard will then point you towards the correct door.

WestFactor

4y↑1

Thanks for watching and commenting. Yep, there are multiple ways to solve this. Glad someone realized it requires more than just asking any true or false question! Aha

cazinger

8y↑2

WestFactor

Hi. That's another great variation and I think there are some comment threads discussing that approach. Some people had trouble understanding it when it was posted but it's a great question and the logic works, as you illustrated. I actually wondered if you were in one of those other threads mentioning this, lol. Thanks for watching the video and leaving that comment. I'm sure others will find it very helpful!

MA

2y↑1

I have been reading all the comments for 2 hours and I only just got the most understandable answer. Thanks. You're a lifesaver 🔥

Anonomous518

There could be a variation of this with Batman: The Riddler and Two-Face have teamed up and kidnapped Commissioner Gordon, when Batman finds them he finds Two-Face in front of two doors, the Riddler says "One of these doors leads to the captive commissioner, the other leads to a deadly trap that not even Batman can survive." You must ask Two-Face a question, and then he will flip his coin and whichever side it lands on will determine whether he answers with the truth or with a lie, and he can't show you the coin when it lands. Oh, and if you try to use force, I'll order my men on the other side to kill the hostage. Riddle me this Batman, which door will you choose?"

Old’s Cool Gaming

I'd simply ask one of the guards "If I were to ask the other guard which door is the wrong door, what would he say?" Then I'd choose the door he pointed to.

Here's how it works.

The Liar would lie and tell you that the Honest Guard would say the correct door is wrong.

The Honest guard would tell that the other guard (liar) would say the correct door is wrong because that's the truth

Lachlan J Phipps

8y↑4

I had the question "Does the Guard of Truth guard the Portal to Paradise." If the answer is yes, then it is either the Guard of Truth being truthful (and you can enter the portal), or the Guard of Falsehood guarding the Portal to Paradise and lying, so you can enter. If the answer is no, the opposite is true, and you enter the other portal.

Autumnrainfall99

8y↑2

+Lachlan J Phipps you dont know which guard is which though

Lachlan J Phipps

+Autumnrainfall99 True, but you don't know that in his solution either

WestFactor

+Lachlan J Phipps Hello:) Just wanted to congratulate you on solving the riddle. I've seen a few comments that tried to work a similar angle, but didn't quite work as a solution. It's really interesting to see how people tackle this. Thanks for commenting! Enjoy the trip to paradise, lol. :)

Lachlan J Phipps

+WestFactor Ha ha, thank you :) Excellent video, by the way :)

risgüey karaya

fixwit

8y↑77

"This sentence is false. Am I correct?" And as I tear a hole in reality, I walk away from both of the doors and live the rest of my life in peace.

WestFactor

8y↑7

+PsychoSphinx lol As Flynn told the Master Control Program in Tron, "How are you going to run the universe if you can't answer a few unsolvable problems?"

Infinite Animations

dubber

Just say no

Innosyde

What's with many thumbs up? There's no coherence.

SgtSupaman

The answer I came up with was a little bit different. I would ask, "If I were to ask the other guard which gate they are guarding, what would they say?" The answer will always tell you what the gate is directly behind the guard you asked. For instance, if the guard you asked is standing in front of the death gate and is the truth guard, he will know the liar guarding the paradise gate will answer that he is guarding the death gate, so the answer is the gate behind the guard you asked. If you asked the liar, he would know the truth guard would answer that he is guarding the death gate, so the liar will say the paradise gate, which, again, is the gate behind the guard you asked. So, it basically works out like you're asking the guard which gate they are guarding.

WestFactor

+SgtSupaman Congrats on solving the riddle ... that was a great solution. Reading some of these answers has been a real treat. Thanks for taking time to leave such a detailed comment. I'm sure others will find it interesting:) Enjoy paradise! Haha:)

Joe Manza

It seems hard, but it's very simple. If you asked the guards "Which door would the other guard say is the right one", the honest one would point to his own door, because he knows that's what the liar would say is the right one. Conversely, the liar would point to the opposite door instead of his own, because he knows the honest one would truthfully it's the right one. So, the right door is the one that NEITHER guard pointed to.

WestFactor

Thanks for watching and leaving the detailed comment. I enjoy when people recognize whats actually involved in solving this since I wish I made it clear for everyone that it's not about determining which one is the liar.

Eclipse

8y↑2

"If you were to verify with the other guard that his door leads to paradise right now without me hearing either of you, could you agree with him if he is the truthful one and you the liar?"

Assuming you are asking the liar, the guard would answer "yes" out of diverting you away from the truth that a liar cannot agree with the truth teller on the same topic and would thus inadvertently point you to the other guard's door.

Assuming you are asking the truth teller, the guard would either be unable to answer or answer "no" for the same reason, and thus would inadvertently point you to his own door.

There is no room for error.

WestFactor

Apologies for not getting a chance to read this great comment until tonight! I really appreciate the logic behind a comment like this. Definitely an interesting approach to tackling the problem of ambiguous answers throwing off standard solutions. That was something discussed in past threads. The solution in the video was made for simplicity, but I always recognized that the riddle presents certain gotchas if not considered, though I think the "spirit" of the riddle tends to overlook that for mostly valid solutions. But it's nice when people think through it to that level. Great comment!

ShikasiXMS

Narelle Ruddock

4y↑7

You don't understand how long it took me to figure this out 🤣

Darryl Louis

7y↑3

This video was helpful it gave me the answer to the riddle I needed in school. Thanks! :)

WestFactor

Sorry I just noticed this comment. Glad it helped! :)

Ian Moldovan

7y↑8

I always solved this riddle differently. I always ask, "Does the guard that tells the truth lead to paradise?" and then you follow whoever says yes. It works reguardless of their positions.

ActuallyEthan

7y↑2

Ian Moldovan but you don't know which one is telling the truth.

Ian Moldovan

7y↑4

ActuallyEthan

Ian Moldovan Ooh, thank you. I feel stupid now

WestFactor

7y↑1

Ian Moldovan Sorry for the late reply! Yes ... lol, that's a great one. I have discussed that particular solution only a few times in all the comments! It's one of my favorites. I tried to make the answer somewhat accessible, so I didn't go with something like that which is harder to follow, but there are older comments where it's discussed. It's definitely a great solution. Thanks for posting!

kyle matchinis

2y↑1

@Ian Moldovan this doesn't work. If u ask them "does the truth guards door lead to paradise?" Then the truth guard would tell u yes if he did, but hed also be honest and tell u no if he didnt. So ur aren't solving it. Say the truth guard leads to death, the truth guard will say "no the truth guard leads to death" which if he is in fact the truth guard then that would be the truth, but he could just as easily be the liar telling you the same thing. The liar would say "no the truth guard leads to death" when in fact it doesn't but by the same token that same statement could actually just be the truth guard being honest with u.

6 More Replies...

Maxwellquipey

1y↑1

Summary:
If you ask the truthful gaurd "what would the other gaurd say if i ask "is the gate behind you safe?"" then he will say "Safe" because they always lie.
If you ask the deceitful gaurd "what would the other gaurd say if i ask "is the gate behind you safe?"" then he would say "Dangerous" because they always lie.

gary schraa

8y↑4

you wait for a shift change , see which door they turn towards , and ask either guard if you may hold the door open for the two of them . doesn't matter which guard you ask , and either answer doesn't really matter . you'll be following them out the door towards freedom . thank you im here all week

Rosie Brown

8y↑3

I love you! 😂👌

gary schraa

8y↑3

Rosie Brown woo! ty supposedly it's a 2000 yr old logic puzzle . thank you Rosie
~:- }>

WestFactor

8y↑3

Lol ... Well I must admit, I appreciate the logic behind your post. I like when people think outside the box for this. Sorry for the late reply. People have talked about attacking the guards, giving commands, etc. This idea is interesting ... lol. So I'll share my thoughts on this. One reason I chose this style for the animation, with portals instead of doors and guards that aren't quite normal, partly relates to this. The main reason is that I wanted to draw something cool, but I also felt that certain loopholes exist the closer this scenario gets to real life. This idea is great if you're talking about real guards and prisoners, or some human facility where they take breaks/change shifts. I could see Jack Sparrow doing this in a movie lol.

When I did the artwork for this, I considered some of that. So in this setting, there's no guarantee that the guards will leave because the nature of the guards is something of a mystery as presented here, and portals establish that we aren't in Kansas, as it were lol . But let's say that they did require rest and nourishment, thus changing shifts. One gotcha is that they don't necessarily leave through the two doors, or allow you to see it. In a fantasy setting, the guards could use apparition ala Harry Pottery and avoid the two exits. For regular peeps, a mechanism or helpers might shield you from seeing the exit they use.

BUT I'll say that I could see this working if it's implemented by entities who didn't consider this idea ... lol.

gary schraa

8y↑2

WestFactor and it is true , I knew going in that your scenario prevented this answer from really breaking out so to speak . the real answer is totally logical , but lacked that "No way ! " factor . ( had it been present day ) . believe it or not , I hated logic puzzles and avoided them ___ until a few days ago I had never seen this one and couldn't wait to post my (spontaneous) answer . guards today love overtime but not that much lol TY & thx for getting back to me

gary schraa

8y↑2

WestFactor post script ; I ultimately found on a Purdue or UCLA website (after my eureka moment ) this logic puzzle and more , along with an answer and reasoning behind it which opened the door for me to test my wits further . seeing as I am a smartass sometimes

3 More Replies...

AndyPaxTheGameCat

37w

I used to think this riddle was dumb. I figured that you can simply ask any question you already know the answer to. Like “what colour is my shirt”? If the guard gives anything but the objective answer, you know he’s the lier. However, I always assumed the lier guards the bad door. That’s not always the case. So finding the lier with one question doesn’t get you to paradise, just determines the lier.

Grizem Prasinu

Ask "Is this considered a question?"
It doesn't matter which guard you ask or if it's considered a question or not. If it is the guard that lies will tell you it's not, but when you ask him another question he won't answer, if it's not he will tell you it is but when you ask him another question he will answer it and vice versa.

Hugo M

7y↑9

What if you asked them "Does the guard in front of paradise speak the truth?" If they reply yes then that's the door to paradise. If no, then go through the other door

WestFactor

7y↑2

Yep, that works and only a few people have mentioned that particular approach. Nice job! Thanks for commenting:)

TimelessAdventurer

31w

Say that the liar is in front of paradise and you ask the liar that question and he says “yes”: the liar would say yes bc the one in front of paradise is the liar which would be no, but since he lies he says “yes”. And if the liar was in front of death then he would say no bc the truthful one is in front of paradise which would be yes if the truthful one answered, but the liar answers and says no. So yeah, that door to the one that says yes, and the opposite door to the person that says no.

Mitch Burns

8y↑1

I've had this problem posed to me before, and I figured it out quite quickly, almost right away actually. Still really cool though.

WestFactor

Thanks for watching. I tried to spice it up a bit by giving my presentation more of a fantasy/mystical style. Thanks for commenting!

Mitch Burns

8y↑1

No problem. I enjoyed the video. When I had this question posed to me before it was actually in a game of Dungeons and Dragons, so it had plenty of fantasy/mystical there too. I was quite pleased to see the question on here. It is good to know I'm not the only one who knows how to solve it.

WestFactor

I know this is a super late reply (never saw your post), but I had to say props for the Dungeons and Dragons reference! Hehe:)

Mitch Burns

WestFactor Thank you. I am a huge D&D nerd.

Mark Warden

I love this riddle too, however there is one key assumption never explicitly stated: the guards know the status of the other guard. If they didn't, then the sad hero would get the answer, "I don't know."

WestFactor

+Mark Warden Hi:) Very true. That's actually something I considered one time since you don't know the full scope of their knowledge. You can ask a question that makes the guard answer about only himself to deal with that, but when I made the video, I was worried that might be too confusing. Great observation. Thanks for commenting:)

A M

8y↑1

This video is over 2 years old but I just saw it, and it's WAY too easy. "Is the Truth-teller in front of the Paradise Door?" If the guard answers YES, you go through his door. If he answers NO, you go through the other door. You will always go through the Paradise Door this way. There is no challenge here because there are only two possible scenarios (Truth-Paradise & Liar-Death, or Liar-Paradise and Truth-Death).

WestFactor

Haha, congratulations. A few other comments did mention that specific solution, though most people submit a different one or just try to determine which guard is lying lol. Just wanted to clarify that this was my presentation of Knights and Knaves, not an original puzzle conceived by me. Thanks for commenting!

Ynook

8y↑1

If I'd ask the other guardian which door leads to paradise, what will he tell me? If you ask this question, you will get the same response from both guardians, a response that will help you know which is the door that leads to death. This riddle is like the one with the road to Athens.

WestFactor

8y↑1

+Ynook Magic Yep, this is essentially the solution presented in the video, though worded differently but with a similar explanation. Thanks for watching!

Carlys

8y↑2

a great illustration of this classic! Well done!

WestFactor

+Carlys Thank you very much. I appreciate that!

ali mahan

Selva Hechicera

8y↑7

Never play by their rules. Kill both guards and have the portals taken back to the alchemy lab for analysis. Now we can make portals to wherever the (smurf) we want.

Portalco now has portals to just about everywhere you could possibly want to go! Visit paradise today and vacation in Valhalla tomorrow! Only 200gp per trip. (Some restrictions may apply.)

WestFactor

lol So sorry that I'm just now reading this! This was a great take on it and a funny twist as well. Thanks for posting this! lol

johnxhsha

the best way

Matt Silva

If this riddle is ever presented in a DND game and your DM has one guard say "one of us tells the truth" and the other guard say "and one of us always lies" then they're both being Liars.

BossSauce

Ask what the other guardian would say about the doors, and go in the opposite door they say. It works because if you asked the truthful one what the liar would say, you can go in the opposite one. If you ask the liar what the truthful one would say, he would lie and point to the bad one. Go to the opposite one because the truthful one would show which door the liar would say and the liar would point to that door, so u know to go to the opposite one. This is an old one.

Maddy Groves

9y↑1

Good animation dude 😃

WestFactor

Maddy Groves Thank you. I appreciate that!

Maddy Groves

Its ok

Snowzaaah

5y↑1

Another solution is: "What would you say if I asked you which portal is the correct one? " Honest guard will give the correct door. And Lying guard will be forced by the qn to lie twice and give the correct door.

WestFactor

5y↑1

Yep! Thanks for watching and commenting on this! I talk about that solution in some older comments and how I almost went with that approach, but I ultimately decided to use the one in the video in case someone was confused by the question within a question. But it didn't matter since everyone thinks the answer is just a true or false question lol.

Snowzaaah

@WestFactor yeah it's rather unfortunate

Gordon Parks

assuming each guard is by a different door, just ask "Is the liar next to the paradise door" to one guard. If he says no, go through that guard's door.

WestFactor

+Gordon Parks That's the ticket. Congrats and thanks for watching/commenting:)

WestFactor

9y↑20

+CountryRoadist Hey, someone actually watched this! Lol:) Unfortunately, I couldn't directly reply to your comment, but I'd like to answer your question. You could indeed determine the liar by asking what is 2 + 2. The problem in this case, is that you still need to know which door to take. So if you ask one guard a normal question, and he lies or tells the truth, you still can't tell which door is correct unless you ask a second question. So that's the tricky part ... you only get one question. That's why it has to be complicated because it has to take into account that you don't know which guard is the liar, and you don't know which door is safe. Thanks for commenting!

WestFactor

***** If you get one question for each, then that will work. :) The standard setup limits you to a single question directed at one guard, but if they allow one question to each, then you can do what you suggested and win that way:) Yep! Thanks for commenting!

Angel Gd

+WestFactor is 2+2=4 solves the math problem, the question is flawed, I explain why and ask the proper logic question after being a jerk about it.

WestFactor

+Angel Gd Please see my other reply that hopefully addresses your points. The page wasn't updating properly at first, so the same reply was posted and deleted about 5 times lol. But I think it finally stayed on there for good.

Angel Gd

8y↑1

WestFactor I know I responded to one reply, maybe 2 but I'm not sure I can find that one can you repost in this thread. I know I came off a little a-holish, but it wasn't my intent, although one guy did sort of deserve it. In terms of your original puzzle, I posted a few replies. I read later you were trying to post a simplified version, but I felt that if the honest guard is guarding the good door, then by asking an infinite possible number of math questions such as "is 5 times 5 equal to 25" or any other number with the proper answer in the question the honest guard has to tell the truth, dishonest doesn't. I took 4 years of electronics, including physics, mathematics and digital electronics and we were given logic problems regularly because they are related to digital in the sense that you have to cover all logical possibilities, same with the programming I took. Often as exercises we addressed many logic problems that were worded in ways that often limited the possibilities to one possible answer. A take on this question as I posted it in another reply was the version of this puzzle. I won't repeat it for a third time, but I do understand you may not have seen it. See if you can locate it just hitting "ctrl f" on this page and then enter angel Gd and it will show you all my responses. I often find people are asking this question leaving way too many possibilities, or even providing validation to wrong answers that with just a little thought will expose the error. I am no genius, but being in electronics, and related math, digital, microcontrollers, and programming as well as physics has allowed me to polish my problem solving skills through using proper diagrams and methods to define the problem in a way that allows you to see the problem in a much easier light. I will rewatch, reconsider and resubmit perhaps if I can by message if there is any validity to what your answer is, I can admit when I'm wrong, but I provide evidence, all I ask is for others (not aimed at you) to consider it and then tell me what they feel is flawed and in the same respect do the same for my take on it. Sorry for the novel but thanks for the reply. I hope you continue this debate with me until we are both satisfied.

WestFactor

+Angel Gd The exchange between you and the guy you mentioned was actually pretty funny. I just told him the same thing lol. Here's what happened with the other replies. After I typed everything I said, I went to post the comment, but the page didn't update. So I tried again, and I then started condensing the post in case there was some character limit causing the problem. That's why the replies got shorter. But nothing took. Then I decided to just reload the comments myself, and I noticed it had posted like 6 things from me in succession lol. So I tried to delete everything, and then just do one response lol. But you probably saw one or two before I had a chance to do that. Had I known the first post took, I would've just let that stay on there. First time that's happened!

I think the issue, and it could be how I presented things in the video, is that you're trying to solve it based on the guards behaving differently in that the honest guard is like a "good" guard who wants you to take the good door, and the other wants to see you choose death, so everything they say flows from that? As it's intended, the only thing they do is answer a certain way, honestly or dishonestly, depending on the guard. I acknowledge that there are multiple ways to word the question to solve it, which is fine as long as it lets you choose the door you want. I had someone say "it's supposed to be a yes or no question" lol. If you can consistently take the correct door, it's an acceptable answer in my mind. But I think our disconnect is that maybe the video made you think the guards behaved differently than I intended, and the honest guard wouldn't suddenly mislead you, and I understand that the solution wouldn't work if you see the guards behaving in a more good and evil style. But the main thing is that he isn't being dishonest if you ask this specific question.

So you go to the portals and you see the two guards. You pick one and ask which portal would the other guard say leads to paradise. If it's the honest guard, an honest answer means giving you the wrong door because you asked what the other guard would say. So he isn't betraying his character. He's giving you an honest answer. The liar will also answer with the wrong door, so it lets us consistently solve it. So I understand your point, and I think it all comes down to how you see the honest guard behaving. He isn't violating his own rules because he isn't guiding us out as much as he's just answering questions. And so we ask a question that forces him to give us the wrong door. This is a great discussion, I admit! Lol

5 More Replies...

B

I came up with 'what portal would you say leads to paradise if I asked you?' it's the same switching around logic; the truth teller would tell me the truth that he would tell me the truth, the liar would have to lie about the lie he would tell. both would point to the say the paradise door.

Anabely P

A lot of people are saying "what's 1+1 and does the portal behind you lead to paradise/death?" would work. And I think so too. I know you say it's two questions and you're only allowed to ask one, but to me, it is one. It's one two-parter question. Idk if that makes sense but im just saying my opinion.

WestFactor

Hi:) Yep, it makes sense and I respect your opinion:) I can see the case for it. :) Though here's a question for you ... lol:) If you told a friend that you would answer her question but she could only ask one, would you accept it if she combined parts like that? Would you answer the whole thing or say that's two questions? I'm genuinely curious since that's also the guard's perspective:) Thanks for taking time to watch and share your thoughts!

Devial James

Alternative answer: Ask one of the guards "If I ask the other Guard if he is guarding the door to paradise, will he answer Yes or No ?"
Should you be in front of the door to Paradise the answer will always be yes; if you're in front of the door to death the answer will always be no, regardless of which guard is actually in front of the door.
Example: You:re in front of the death door, guarded by the Truth teller. The liar would answer your Hypothetical Question with "no" which the Truth teller reports accurately. If they switch places, the answe to the hypothetical would be "yes" by the truth teller, but the liar is going to claim it would be "No". Vice versa for the paradise door

WestFactor

Yep. Great comment. There were some really nice discussions about alternative solutions in some of the older exchanges. I remember when I made the video, I ignored certain gotchas to simply the solution. But it's always great to put the alternatives in the comments. I do wish I had said that it was just one possible answer in the video, but I honestly didn't expect anyone to watch it. lol Thanks for watching this and posting!

Liam White

If I asked you if your gate is paradise, would you say yes?
Truthful guard on good gate: (would say yes that his gate was paradise, and so) Yes
Truthful guard on bad gate: (Would not say yes that his gate was paradise, and so) No
Lying guard on good gate: (Would lie and say yes that his gate was paradise, and so lies) Yes
Lying guard on bad gate: (Would lie and say no that his gate was paradise, and so lies) No
If you get a yes, enter their gate. If no, enter the opposite. Added bonus, you don't play them off each other, so as not to hurt their feelings.

Edwin Mureithi

43w

Finally understood this after so long

[OUT OF SERVICE]

3y↑47

“Am I talking to you right now?”

The Liar: 😨 “Uhhhh, no....”

GoHamOnEm21

3y↑12

That tells you he's the liar... doesn't tell you which door he's guarding

Udit Tatisar

3y↑2

Are you a guard would also suit 😂😂😂

Wael GHL

You are a genius

Lucas Souza

The truth teller: Sure and you have just wasted your question, sir.

Quinnen Crawford

8y↑2

"What would the other gaurd say if I asked them if their door was paradise or death?" That door will always to be what the door of the gaurd you asked.

WestFactor

Nice job and thanks for commenting on this!

Jacquelyn West-Jones

You can also ask, "Which one of you is you?" The guard says the other one, that means his gateway leads to death. So, go into the other one.

WestFactor

6y↑1

Sorry I took so long to answer you. It probably wasn't clear in the video, but in this puzzle the portals are randomly assigned to the guards (it never actually states which guard is assigned to a portal), so the liar is not necessarily guarding death. This is why a simple truth test typically does not let you identify which exit is safe. Sorry I didn't make that clear! Thanks for commenting.

Old’s Cool Gaming

I’d ask one of the guards “If I were to ask the other guard which door is the wrong door, what would he say?” Then they’d point you towards the correct door.

WestFactor

Yep, thanks for commenting. (I was gone for months lol)

Cynthia Zhao

“Which door will the other guard say that will lead to heaven?” If you asked the truthful guard, he knows that the other guard will lie so he will point to the wrong door. If you asked the lier, he knows the truthful guard will say the right door so he will change it. So whatever the guard points if the door that leads to hell.

Improvement Days

Nicely explained!!

dbfan2scfan

7y↑10

WestFactor

Sorry for the delay in responding. Thanks for taking time to type this. Very interesting comment working through this variation. The logic is similar to an approach that's pretty obscure and mentioned just a few times in the comments, though the setup is different. Always nice to see interesting answers!

Duelist RL

5y↑2

You're asking two questions. Not a valid solution. You can't add another question just because you put both in the same sentence with "OR" in between them.

truth96130

That is 2 questions.

Anxiealt

Came from Paolul, this riddle makes so much sense now. Thank you very much!

Jordan Gabrielle

Spaniard Seer

I'm here because there's the slim chance I might be in this situation one day and I need to be prepared.

Mr.E1984

7y↑1

it's a classic riddle, but there's a problem. you're forgetting that the liar could never admit to being a liar. that would be telling the truth. the only way they can both say that one tells the truth and one lies is if they are both lying.

WestFactor

Hi:) Great observation. I always pictured the rules or understanding of the riddle delivered via some other entity or mechanism instead of the guards themselves, to avoid this very problem. So I pictured the narration as kind of addressing that, though I didn't state it explicitly. But I agree that if a guard gives the info, ala Labyrinth, it's a problem. Heh:) Thanks for commenting!

Mark Nowicki

It’s simple you ask one of them “may I come in this door?” The one blocking heaven will say “yes of course” but the hell one will simply say “no”

WestFactor

8y↑52

I'd just like to thank all the people who watched and commented on this video. I didn't think anyone would see it when I first posted it. Happy New Year:)

Robin Powell

8y↑1

+WestFactor I thought of the solution straight away! :)

WestFactor

8y↑1

+Robin Powell That's awesome! Thanks for watching it! :)

FyreAxis

8y↑1

+Robin Powell Same here!

WestFactor

+FyreAxis Nice! :)

Geek/Freak Vlogs and Sports

You ask one guard where the portal to paradise is and if he/shes lying he/she'll say here

23 More Replies...

Sharif Brown

3y↑1

(Points to friend) Will he tell me if the left door is heaven? If the answer is no, it's actually heaven. If it's yes, it's actually hell.

msolec2000

8y↑1

I like this question better: "If I were to ask you where your door leads, what would you tell me?" (Note that this is a different question to "Where does your door lead?")

WestFactor

+msolec2000 Hi. In some of the comments, I talk about this type of question that forces the guard to account for his true nature when answering. I do like that approach. You can do this as a yes/no question as well, such as "If I were to ask if your door leads to paradise, would you say yes?" I went with a different approach in the video partly because I felt this type of question might be a little confusing to some people. Specifically, what you noted about the difference between the simple question that doesn't work, and the actual solution. Thanks for commenting!

Matthew Medrano

Someone told me to just ask if there's a door behind them. Truth would say yes, lie would say no

101perspective

Technically, there is nothing you could ask that would let you know which door to take. There is nothing in the exercise stating that the guards know which door leads where. Also, there is nothing in the exercise stating that each guard knows the other guard always tells the truth or always lies.

WestFactor

Sorry for the late reply! I actually agree with this and have said in older comments that there are gotchas unless certain assumptions are made. I would say just in the spirit of the riddle itself we can at least assume that the guards know the destination of the exits ... you can solve without requiring one to know the answers of the other to avoid that concern ... but I think the exit destination can be assumed, though I admit it's not stated in the setup!

S&S AMERICA

When I was a kid I heard this and I thought it was super smart but then a few years later I remembered the riddle but forgot the answer and I thought to myself "Was it agenst the rules to just ask either guard What's 2+2 and be done with it" Its still pretty smart though.

Edit: Also if the guard that tells the truth doesn't vanish you could literally ask anything and the guard will tell you. But in a truly perfect paradise, you would have access to all knowledge I'm guessing.

Not a plague doctor

4y↑1

You can only ask one question to ONE GUARD(not both)and asking 2+2 to them wont really help you since you need to identify which door leads to paradise..

S&S AMERICA

@Not a plague doctor Oh so the one guarding the paradise couldn't be eithor the lier or the one that tells the truth. I thought the one that tells the truth would automatically be the one that leads to paradise. Thx for explaining

edit: Could*

what if! world

7y↑15

omg amazing answer seriously outstanding

WestFactor

7y↑1

Thanks for commenting and watching!

Jeneus Schneider

@WestFactor cant you just ask one of them is 1 + 1 = 2 and if they say no they are the liar

tails55

7y↑1

WestFactor

Sorry for such a late reply! I appreciate the thought behind this comment ... interesting tweak and fun for me to read! Thanks for posting:)

xShadowWolf23x

since you know that each guard protect each portal you can ask what portal do you protect . because of this the guard that always tells the truth will automatically point to his portal and the liar who protected portal will also point to the guard that tells the truth portal

WestFactor

This is the idea from the two villages riddle? The only gotcha in this case is that, as the riddle is told, the guards could be assigned to either portal. So the honest guard could actually be assigned to death, and the liar could guard paradise without any attachment to death. So that's what makes this one different. But that's a great comment! Thanks for sharing!

Gabriel Aubry

(Traveller is then slowly and painfully violated and tortured to death)
Guard: "You honestly haven't considered that we might be both lairs?" >*D

truth96130

4y↑3

Remmark Sunga

8y↑4

honestly I was getting ready for some type of jumpscare like a screaming monster face when entering the door because I might have gotten in the wrong door and death will appear in some form of jumpscare

WestFactor

8y↑1

+Remmark Sunga The jump scare that never was! Maybe I could add that in the special edition - Lol. Thanks for the comment!

Cawub

8y↑1

EXPLANATION: If they both tell the wrong answer, then the doors are the opposite of what they say. So If they say left door is paradise, it is not. So right door is paradise.

WestFactor

Thanks for watching and leaving a helpful comment for others!

Strawberryblonde

8y↑1

If trying to make this more binary i.e. yes/no, let's propose the question: "yes or no, does the liar guard the door to death?" this works because if you ask the question to the truth guard and he says yes then you know you want to take his door. But at this point you don't know whether you're asking the truth guard so let's look at it from the perspective of asking the liar the same question. This time if the guard says yes, he is lying about guarding the death door and you can safely pass through his door. Either way if the guard says yes then you can go through the door guarded by the one you asked if the guard says no then you must go through the other door.

This question was brought up recently as a tribute to labyrinth and David Bowie. The solution given in many articles I've read is consistent with the posters video however I think that this response is just as valid and may be how others are looking at the question (I.e. as binary).

WestFactor

+Strawberryblonde Hello:) Thanks for typing such a detailed comment! Some of my other replies actually address a more binary approach (which you may have seen), and this is similar to those questions in that the idea is to force a consistent yes or no answer. Now your first part is something I thought about mentioning in another reply, and that's the "yes or no" to limit the answers. This approach of embedding acceptable answers within the question is theoretically the simplest solution to cutesy/creative answers from the guards, though I've wondered if the guards would honor it.

This gets into a sort of meta analysis where we consider the enforcement of a certain code of conduct in how the guards answer. Most people assume a certain behavior by the guards in that their answers will logically indicate one of the two doors if asked an appropriate question. I started considering that even a yes/no question could be answered with something like "maybe" or "definitely." So I do like the idea of restricting the answers, which is really the key to any of these approaches. I just wonder if they would make it as simple as that, particularly the liar. But it's probably the best shot at getting a consistent answer.

HUMDINGER_Chris

44w

The easiest way to absolutely get it right is to put up 1 finger and ask a guard "how many fingers am I holding up?" If they say the correct number, then it's heaven, if they lie, then it's hell.

Hollow

36w

You don't know which guard is on the hell or heaven door

Evan Tatavitto

you could ask both of the guards"what would the other guard say leads to Paradise" the guard that tells the truth would say that the the other guard would point you to the death door, and the guard that lies would say the guard that tells the truth would point to the door that would lead to Paradise and then have to lie about it and point to the door that leads to death, so you would go the other way, another question could be "what would the other guard say leads to death"

WestFactor

+Evan Tatavitto That's right, and it's the solution I used in the video itself. :) Thanks for watching and taking time to leave this comment!

Martín Alfredo Burcheri Voet

Labyrinth, 1986 dirigida por Jim Henson. La puerta lleva al "olvidadero"

Old’s Cool Gaming

7y↑4

WestFactor

7y↑1

That's right. Thanks for viewing this and leaving the detailed comment:)

ZodiacWeirdo

4y↑1

Here's a logical answer. I figured this out in 1 day. You tell 1 guard to ask the other guard which door it is and they both would point at the same door . Which would be the life door. (I know this was 3 years ago but I just wanted to let everyone else know the answer)

ZodiacWeirdo

Or you tell 1 guard to ask the other guard which door it is. And if they point at opposite doors then ask the 1 guard you asked before too point at who's telling the truth then ask the same guard you were talking to. To ask the other guard to ask him who's telling the truth. Then they would point at the same person meaning that is the door you go through. Boom.

ZodiacWeirdo

But remember you can't talk to both guards..so you wouldn't be able to ask that other guard. And also you don't know which one is lying or not. Your answer makes sense but their is only 2 errors.

GuitarMD Pittsburgh

More to the point, you should ask either guard, "What would YOU say if I asked you which door leads to paradise?"
The liar will send you to the paradise door.
The truth teller will also send you to the paradise door
Just sayin'

WestFactor

Hi. So that's actually my preferred approach and I do mention and explain that one in the older comments. The problem is that I didn't know if most viewers might be confused and have trouble distinguishing that from a simple "which door leads to paradise?" I agree it's a more elegant approach, but I thought this approach might be more accessible. But I've covered that and other solutions in the comments. Thanks for watching! :)

Shallow God

My answer was "Do you know that the liar guards death? If he speaks the truth and the liar does guard death, he will will say "Yes." If he speaks the truth but the liar does not guard death, he will say "No."
If he speaks in lies and he does guard death, he will say "No." If he lies and doesn't guard death he will say "Yes." So yes would always mean the one you ask is guarding paradise

Christian Dierlam

This one is ridiculously simple just ask a guard doesn't matter which one, is the other guard alive and if they say no that's the liar if they say yes that's the truth

Mortis Malum

9y↑1

P.s.: It's nice to find another riddle lover :)

WestFactor

Mortis Malum Sorry I didn't see this sooner. Thank you for taking time to watch and comment on this. I didn't know if there was much interest in riddle vids on here lol. Glad I was wrong. Nice to meet you, as well!

LoganReads

8y↑1

This reminds me of Para & Dox from Yu-Gi-Oh, but, I am sure this riddle is the inspiration for those two.

WestFactor

Yep, I heard from others on here that they featured this riddle on Yu-Gi-Oh, but I somehow missed that episode . I'll have to watch that. Thanks for commenting!

Rosie Brown

8y↑3

I know the "solution", but I have ONE question.
Does the two guards know that only one of them speaks the truth?
I have read this riddle many times and it never tells.
So if the liar answered the question he wouldn't KNOW the answer, but he can't say "I don't know" because then he would be telling the truth...... or are we just assuming that a liar always knows that the other person is telling the truth....? 😑
I'm sleepy.

Liamjm

Why would the liar not know that the other guard is the truth teller if he's the liar?

Rosie Brown

8y↑2

Liamjm
I don't see why they have to know that only one of them speaks the truth... And the riddle never tells you that they know.
But you are probably right, they stand there for the same reason and SHOULD be knowing about one an other. Their system would fail otherwise xD

Liamjm

8y↑2

Rosie Brown They do know it. There would be no point in the riddle otherwise.

Rosie Brown

Liamjm Yeah I understand that. You're totally right!
I'm just one that get caught up on details 😂

WestFactor

Rosie Brown Hi:) Sorry for the late response. This is an interesting question. I've had some pretty deep discussions about the details with people on here in the comment section. So one thing we'll consider which ties into Liamjm's response is what I call the spirit of the riddle (or puzzle). Meaning that we normally assume certain things from how it was designed and the solutions accepted over time. From that perspective, we'd generally assume that each guard knows the nature of the other, BUT I'll admit that this isn't explicitly stated when you typically read or hear it. So let's discuss that. One way to avoid that uncertainty is with a solution that involves only ONE guard. I almost used this in the video, but thought it might be too confusing.

We can ask something like "If someone asked you if your portal leads to paradise, would you say yes?" Now we've eliminated any dependency on knowing the second guard's answer. Now the interesting thing is that ... if we question everything, we now might question if the guard actually knows which portal leads to paradise. I can be a liar or truth-teller without actually knowing where the portals take me. The riddle doesn't typically state that the guards have that knowledge. So again we turn to the spirit of the riddle to assume that they have it or else we can't solve it via a question (the intended approach).

You also touched on another topic: nebulous answers that don't neatly fit a binary response. Solutions expect a certain type of response that will neatly map an answer to a specific portal in some way. What if you asked the honest guard which portal the other guard would suggest, but the other guard has a history of giving very ridiculous answers. Now even the honest guard could say "I don't know" and it's the truth. Ruh-roh! Lol And in your scenario where the liar didn't know what the other guard would say, but he can't say I don't know because it's honest ... maybe he could say something like "The same one I would tell you if the other guard is honest." Now I've lied to you without knowing the other guard's nature while still technically answering your question in a way that doesn't help you at all. So I guess there isn't a definitive answer here, but I generally consider how someone conceived of their riddle being solved to try and sort out these issues, though the discussions can be pretty intense. Hehe. Hope some of this rambling was interesting. Thanks for commenting!

1 More Replies...

klandersen42

Talpa 1987

8y↑1

I would have asked: "What would the other guard say, if I asked him to where your door leads?" If the one I asked said: "hell" there are two possibilities.
1.: He is honest, then the answer "hell" comes from the liar and I know, where to go for heaven.
2.: He is the liar. Then his answer is a lie and the real answer is "heaven". So again I know where to go.

WestFactor

+Speireata4 Yep, this is another solid approach. Good job and thanks for commenting:)

Elise Vanpool

8y↑1

Can't you just ask the one on the left, "Are you standing on my left or my right?" If he says left, he's the truth guard, if he says right, he's the liar.

WestFactor

Hi:) Sorry for any confusion about this, but the riddle never actually states how the guards are assigned to the portals. So the liar could be in front of paradise, for example. That's what makes it somewhat tricky. A guard could be assigned to either door. Hehe:) Thanks for commenting!

Eloy Eligon

7y↑1

I would ask: Is the truthful guard on the paradise door? If you are asking to the truthful guard and he is on the paradise door, he would say YES, and if he is on the death door, he would say NO. On the other hand, if you are asking the liar and he is on the paradise door, he would say YES, and if he was on front of the death door, he would say NO. So, if the guard says YES, go trough that door, and if he says NO, go trough the other door! Am I missing something?

WestFactor

7y↑1

Very nice! That's one of the more obscure solutions in that only a few people have considered it. Hehe:) Thanks for taking time to watch and comment on this!

Niro

For everyone commenting, I would ask them my shirt color or something. You can only ask 1 question to 1 guard. The lying guard doesn't necessarily mean his Portal goes to heaven or hell. So what do you do then with no more questions?

WestFactor

+Elec7ric Niro That's right! It's easy to overlook those points, so it's nice to see this. Thanks for commenting! :)

ThePugLord

5y↑33

Kill one and ask the other “Is he dead?”

WestFactor

5y↑8

lol The first part of that would be fun to watch.

TheIndieProcess

3y↑3

but you still wouldnt know which door to go through then

Marionforge

3y↑1

You still don't know which is the correct way.

TheCulturedMan

Ask them both "Are you alive?"

ELITEtvGAMER

@TheCulturedMan You can only ask one of them. 0:45

Jawad

but if the liar has the magic door, theyre both going to say “he says he has the magic door”, then it gets reduced to probability

Mimikyute 72

7y↑1

My strategy would be to ask both of the guards if they could show me to the bathroom, which would presumably be through the paradise portal. The lying guard would say no. If the lying guard had said yes, he would have been telling the truth, which he can't do. The honest guard would say yes and motion to the paradise portal. Only the honest guard could say yes, as being a guard should also know where the bathroom is. Would this work?

WestFactor

Sorry I didn't see this when you posted it. I'll give a proper reply to your question in a bit!

Mimikyute 72

Okay!

WestFactor

Hi. Sorry I didn't reply sooner! I like the thinking behind this. :) Now I think the main issue here is that the rules in this version basically require us to ask the question to only one guard:( So you can't put the question to both of them and compare answers. Sorry if that wasn't clear. But I do like the thinking! :)

Billy Turner

In the case of the heaven and hell one it's the same question
Just say what's hell like?
The guard for hell would say it's great (a lie)
The guard for heaven would say it's bad (the truth)

Zero Yeti

The Inverse Is You Could Ask "If I asked the other guard which door leads to death, Which door would he point to?" The Honest Guard knowing the Lying Guard would point to the door of Life, Would Point to that door. The Lying Guard will know the Honest Guard would point to the door of death, so he will point to the Door of Life. So what ever door they point to enter that one, because that is the door of life.

WestFactor

+Zero Yeti That's correct:) When I did the video, I was worried that the solution might be too confusing if I tried certain variations. I didn't know if people would accept asking about the death door, and then going through the door indicated by the guard . But in hindsight it's the same concept, and it's really no harder to follow than asking about paradise and taking the opposite door lol. I'm thinking about making another video to kind of give some additional perspective on the riddle in response to all the comments. Thanks for commenting! I'm sure others will find it helpful! :)

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