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dreamsequencer Freelancer Union Unaffiliated	Posted - 2008.06.17 20:54:00 - [1] A dungeon has two corridors and at the end of each corridor there's a door. One door leads to freedom, the other one to the hangman. There are no markings on the doors. Outside of each door is a sentinel. One sentinel is always truthfull. The other one is a liar. There is one prisoner in the dungeon awaiting execution. The prisoner knows about the doors and the sentinels. In order to know what door leads to freedom he can ask only one question and he can ask only one sentinel. If he asks the right question he can choose the door of freedom once he knows the answer to his question. What's the question? --- Dulce et decorum est pro patria mori The Universal Migrator ---
dreamsequencer Freelancer Union Unaffiliated	Posted - 2008.06.17 20:54:00 - [2] A dungeon has two corridors and at the end of each corridor there's a door. One door leads to freedom, the other one to the hangman. There are no markings on the doors. Outside of each door is a sentinel. One sentinel is always truthfull. The other one is a liar. There is one prisoner in the dungeon awaiting execution. The prisoner knows about the doors and the sentinels. In order to know what door leads to freedom he can ask only one question and he can ask only one sentinel. If he asks the right question he can choose the door of freedom once he knows the answer to his question. What's the question? --- Dulce et decorum est pro patria mori The Universal Migrator ---
Sabrosa Namaste	Posted - 2008.06.17 20:59:00 - [3] ''where are my keys''
Sabrosa Namaste	Posted - 2008.06.17 20:59:00 - [4] ''where are my keys''
nihlanth	Posted - 2008.06.17 21:01:00 - [5] "What is the right question?"
nihlanth	Posted - 2008.06.17 21:01:00 - [6] "What is the right question?"
zombiedeadhead	Posted - 2008.06.17 21:05:00 - [7] He would ask the sentinel 'Are you a Tree-frog?'. And if you can tell me the name of the film that is from, I'll be very impressed. Just because you know a japanese word doesn't make you intelligent
zombiedeadhead	Posted - 2008.06.17 21:05:00 - [8] He would ask the sentinel 'Are you a Tree-frog?'. And if you can tell me the name of the film that is from, I'll be very impressed. Just because you know a japanese word doesn't make you intelligent
Karma Eve University	Posted - 2008.06.17 21:09:00 - [9] let's call them door Freedom and door Death... ask either of them: "which door will he (the other one) say is the door to freedom?" The one that lies will lie about his friend's answer, and point to door DEATH. and the one that tells the truth, will tell you the truth about his deceitful friend and equally point you to door DEATH. so take the other door.
Havok Dryke Golden Gavel Enterprises The Cooperative	Posted - 2008.06.17 21:09:00 - [10] Ask either sentinel whether or not he is a sentinel and is this the right door? The Liar will answer no and yes The Truthful one will answer yes and yes If the sentinel you talk to says he is not a sentinel, take the other door, not the one he recommends. --- Kaboom: The process by which large objects are broken down into many small objects. Originally by: Alz Shado Chribba doesn't mine Veldspar -- the ore offers itself to him in tribute.
Blue Binary Polychoron	Posted - 2008.06.17 21:11:00 - [11] Ask the sentinel, "Is the other prisoner here to be executed?". The answer will show who is the liar and who speaks the truth. ____________ Blue B⁫⁫⁫⁫inary
ReaperOfSly Lyrus Associates The Star Fraction	Posted - 2008.06.17 21:15:00 - [12] Edited by: ReaperOfSly on 17/06/2008 21:15:59 Originally by: Havok Dryke Ask either sentinel whether or not he is a sentinel and is this the right door? The Liar will answer no and yes The Truthful one will answer yes and yes If the sentinel you talk to says he is not a sentinel, take the other door, not the one he recommends. That's 2 questions. The question you need to ask is: "what will the other sentinel say he guards - Freedom or death?" If he says "death", you go through the door guarded by the other sentinel. If he says "freedom", you go through the door guarded by the sentinel you asked. __________________________ Quote: ...bored, skint, no charter, and a ship that looks like an explosion in a girder factory...
Micheal Dietrich Terradyne Networks	Posted - 2008.06.17 21:20:00 - [13] The guard giving the instructions isn't automatically the truthful one by default. The matter of which one lies and which one tells the truth only has to do with the actual riddle after the rules of the riddle are given. You have two guards who are guarding two doors. One guard tells the truth. One guard lies. One door leads to a horrible death and the other door leads to the hangman. Here's where it may get tricky. It has nothing to do with which one is the liar and which one is being truthful. The trick is to get them to give the same kind of answer. And here's how you do it. You have one truthful guard and one lying guard. If you ask the truthful guard if the other guard (liar) would say the door you're pointing at would lead to the hangman he'll truthfully tell you what the liar would say because you're asking the truthful one what the liar would say. So you get the lie as his answer by default. He is truthfully quoting the liar. If you ask the liar if the other guard (truthful) would say if the door you are pointing at leads to the castle the liar would NOT tell you honestly what the other door would say. He would tell you the lie because he is the lair. So you get the lie by default. Either you're asking an honest person what a liar would say or you are asking a liar what an honest person would say. As a result you always get the lie as the answer. It's really very simple. If you ask one guard what the other guard would say (nevermind which one's truthful or lying) you will automatically get the lie as the answer by default. It's very simple. BTW that was ripped from the labrynth. I just changed a few things. 80's movies ftw Originally by: El'tar I WOULD WARRIOR FOR WOMAN BELONG TO ME!
Slade Trillgon Siorai Iontach Brotherhood of the Spider	Posted - 2008.06.17 21:21:00 - [14] Edited by: Slade Trillgon on 17/06/2008 21:22:15 In to late since the answer has been given. This question reminds me of the question that was asked in the movie Labyrinth. Slade EDIT: Mike D. beat to the Labyrinth idea.
ReaperOfSly Lyrus Associates The Star Fraction	Posted - 2008.06.17 21:24:00 - [15] Originally by: Micheal Dietrich The guard giving the instructions isn't automatically the truthful one by default. The matter of which one lies and which one tells the truth only has to do with the actual riddle after the rules of the riddle are given. You have two guards who are guarding two doors. One guard tells the truth. One guard lies. One door leads to a horrible death and the other door leads to the hangman. Here's where it may get tricky. It has nothing to do with which one is the liar and which one is being truthful. The trick is to get them to give the same kind of answer. And here's how you do it. You have one truthful guard and one lying guard. If you ask the truthful guard if the other guard (liar) would say the door you're pointing at would lead to the hangman he'll truthfully tell you what the liar would say because you're asking the truthful one what the liar would say. So you get the lie as his answer by default. He is truthfully quoting the liar. If you ask the liar if the other guard (truthful) would say if the door you are pointing at leads to the castle the liar would NOT tell you honestly what the other door would say. He would tell you the lie because he is the lair. So you get the lie by default. Either you're asking an honest person what a liar would say or you are asking a liar what an honest person would say. As a result you always get the lie as the answer. It's really very simple. If you ask one guard what the other guard would say (nevermind which one's truthful or lying) you will automatically get the lie as the answer by default. It's very simple. BTW that was ripped from the labrynth. I just changed a few things. 80's movies ftw Isn't that just a very long-winded way of saying what I already said? __________________________ Quote: ...bored, skint, no charter, and a ship that looks like an explosion in a girder factory...
Karma Eve University	Posted - 2008.06.17 21:30:00 - [16] Edited by: Karma on 17/06/2008 21:31:56 Originally by: ReaperOfSly That's 2 questions. The question you need to ask is: "what will the other sentinel say he guards - Freedom or death?" If he says "death", you go through the door guarded by the other sentinel. If he says "freedom", you go through the door guarded by the sentinel you asked. there are no markings on the doors. I could edit mine to say 'the left door' or 'the right door', and it'd work still. since that one question will give the same answer no matter which sentinel you ask.
ReaperOfSly Lyrus Associates The Star Fraction	Posted - 2008.06.17 21:31:00 - [17] Originally by: Karma Originally by: ReaperOfSly That's 2 questions. The question you need to ask is: "what will the other sentinel say he guards - Freedom or death?" If he says "death", you go through the door guarded by the other sentinel. If he says "freedom", you go through the door guarded by the sentinel you asked. there are no markings on the doors. So? I never assumed there were. If I were 13, I would be saying "lern 2 reed lol" right about now. __________________________ Quote: ...bored, skint, no charter, and a ship that looks like an explosion in a girder factory...
Karma Eve University	Posted - 2008.06.17 21:36:00 - [18] Originally by: ReaperOfSly Originally by: Karma Originally by: ReaperOfSly That's 2 questions. The question you need to ask is: "what will the other sentinel say he guards - Freedom or death?" If he says "death", you go through the door guarded by the other sentinel. If he says "freedom", you go through the door guarded by the sentinel you asked. there are no markings on the doors. So? I never assumed there were. If I were 13, I would be saying "lern 2 reed lol" right about now. shrugs my mistake.
Micheal Dietrich Terradyne Networks	Posted - 2008.06.17 21:36:00 - [19] Originally by: ReaperOfSly Isn't that just a very long-winded way of saying what I already said? Yeah. I woulda been in before ya but it took me too long to modify and edit some spelling. Originally by: El'tar I WOULD WARRIOR FOR WOMAN BELONG TO ME!
Gone'Postal Scoopex The Volition Cult	Posted - 2008.06.17 21:38:00 - [20] No matter what you ask it's still 50/50 It's not told in the OP that the lier sentinel is standing by the door to the hangman or not, So even if you find out what sentinel is the lier or truth one, it makes no diffrence. Questions, Comments, Problems, Please address them to the CSM.. Now CCP Never have to visit the forum. -V8I-
Patch86 Di-Tron Heavy Industries Atlas Alliance	Posted - 2008.06.17 21:44:00 - [21] This ones an easy one (and I've very carefully not read anyone else's answer for this one, since its one I think I can do). You go up to either Sentinel and ask "If you were the other Sentinel, which door would you recommended I go through for freedom?" The Truth Teller will comply with your request, and truthfully tell you what the liar would say- he'll tell you to go through the death-door. The Lie Teller won't comply, and won't tell you what the truthful Sentinel would say- he'll tell you to go through the death-door. So regardless of which sentinel you ask the question, you can do the opposite of what they recommend you do for freedom. ------ Originally by: Dark Shikari The problem with killing Jesus is he always just respawns 3 days later anyways.
Gone'Postal Scoopex The Volition Cult	Posted - 2008.06.17 21:46:00 - [22] Originally by: Patch86 This ones an easy one (and I've very carefully not read anyone else's answer for this one, since its one I think I can do). You go up to either Sentinel and ask "If you were the other Sentinel, which door would you recommended I go through for freedom?" The Truth Teller will comply with your request, and truthfully tell you what the liar would say- he'll tell you to go through the death-door. The Lie Teller won't comply, and won't tell you what the truthful Sentinel would say- he'll tell you to go through the death-door. So regardless of which sentinel you ask the question, you can do the opposite of what they recommend you do for freedom. Your assuming the sentinels know what door leads to what :P Questions, Comments, Problems, Please address them to the CSM.. Now CCP Never have to visit the forum. -V8I-
Micheal Dietrich Terradyne Networks	Posted - 2008.06.17 21:48:00 - [23] Originally by: Gone'Postal Your assuming the sentinels know what door leads to what :P You never saw labrynth did you. Originally by: El'tar I WOULD WARRIOR FOR WOMAN BELONG TO ME!
Gone'Postal Scoopex The Volition Cult	Posted - 2008.06.17 21:49:00 - [24] Originally by: Micheal Dietrich Originally by: Gone'Postal Your assuming the sentinels know what door leads to what :P You never saw labrynth did you. No but that information isn't in the OP :) assuming we can only go off that info.. They don't know either. Questions, Comments, Problems, Please address them to the CSM.. Now CCP Never have to visit the forum. -V8I-
Patch86 Di-Tron Heavy Industries Atlas Alliance	Posted - 2008.06.17 21:49:00 - [25] Originally by: Gone'Postal Your assuming the sentinels know what door leads to what :P This is true. I'm assuming thats what the OP meant. If the Sentinels had no idea which door was what, there wouldn't be much point in them being there ------ Originally by: Dark Shikari The problem with killing Jesus is he always just respawns 3 days later anyways.
Gone'Postal Scoopex The Volition Cult	Posted - 2008.06.17 22:00:00 - [26] Edited by: Gone''Postal on 17/06/2008 22:00:16 Originally by: Patch86 Originally by: Gone'Postal Your assuming the sentinels know what door leads to what :P This is true. I'm assuming thats what the OP meant. If the Sentinels had no idea which door was what, there wouldn't be much point in them being there True.. Questions, Comments, Problems, Please address them to the CSM.. Now CCP Never have to visit the forum. -V8I-
Lumy Templars of Space	Posted - 2008.06.17 22:01:00 - [27] Violence is the correct answer Joomla! in EVE - IGB compatible CMS.
Micheal Dietrich Terradyne Networks	Posted - 2008.06.17 22:33:00 - [28] Originally by: Gone'Postal Originally by: Micheal Dietrich Originally by: Gone'Postal Your assuming the sentinels know what door leads to what :P You never saw labrynth did you. No but that information isn't in the OP :) assuming we can only go off that info.. They don't know either. yeah in the movie she walks up to the doors who are the guards. Both doors knew which path was which and gave her the rules. You may only ask one question to one door and use that answer to pick which door to go through. One door goes to the castle and one to certain doom. One door lies and one door tells the truth. By asking the first door what he thought the second door would say about where the first door goes she would get a default answer or a generic lie therefore giving away which door goes where. Originally by: El'tar I WOULD WARRIOR FOR WOMAN BELONG TO ME!
Kyrall 24th Imperial Crusade	Posted - 2008.06.18 02:03:00 - [29] Originally by: Lumy Violence is the correct answer Heh yeah, OOTS is great. Not surprisingly, XKCD also has something to say on the subject... - Originally by: Grarr Dexx YES PLEASE TOUCH MY ABSOLUTION
EnslaverOfMinmatar Yarsk Hunters DeaDSpace Coalition	Posted - 2008.06.18 06:46:00 - [30] What is the capital of Assyria?
dreamsequencer Freelancer Union Unaffiliated	Posted - 2008.06.18 14:50:00 - [31] I have read wrong answers, half right (= nice try) and correct answers. Mainly it's all about asking a question to 1 sentinel about the other sentinel. Like fi. "ask the other sentinel if he's alone at the door". Trial and error will learn that you have 4 possible answers. Depending on the answer you will know what door to pick. In the case of this question don't go through the door where the guard gives you the "no" answer. Assur is the capital of Assyria --- Dulce et decorum est pro patria mori The Universal Migrator ---
zombiedeadhead	Posted - 2008.06.18 17:20:00 - [32] Prisoner - 'Are you a tree-frog?' Sentinel - 'Yes I am' Prisoner - 'LIAR! Point me to the flaw in this method, and i will admit defeat, till then I say Kasper Hauser knows. -------------------------------------------------- Just because you know a japanese word doesn't make you intelligent
Karma Eve University	Posted - 2008.06.18 18:09:00 - [33] some (dare I say most?) of you seem to assume that the lying sentinel stands in front of the door to death, and that the truthful sentinel stands in front of the door that leads to freedom... what if they're simply two doors... unmarked doors. what if they don't even stand in front of a door each? what if they're both standing to the side having a chat? or sitting on the floor in the middle of the room? then asking one question to see which one is lying will get you nowhere. you still don't know which door leads where.
Patch86 Di-Tron Heavy Industries Atlas Alliance	Posted - 2008.06.18 18:18:00 - [34] Originally by: zombiedeadhead Prisoner - 'Are you a tree-frog?' Sentinel - 'Yes I am' Prisoner - 'LIAR! Point me to the flaw in this method, and i will admit defeat, till then I say Kasper Hauser knows. -------------------------------------------------- All that question tells you is which Sentinel is the liar. Seeing as you're only allowed to ask one question, and you still don't know which door to go through, I'd say that question doesn't work. ------ Originally by: Dark Shikari The problem with killing Jesus is he always just respawns 3 days later anyways.
zombiedeadhead	Posted - 2008.06.18 18:43:00 - [35] Originally by: Patch86 All that question tells you is which Sentinel is the liar. Seeing as you're only allowed to ask one question, and you still don't know which door to go through, I'd say that question doesn't work. Your right, I'm wrong, I was familiar with another form of this question, which is a forked road leading to a village of liars and a village of truth-tellers, which is the question asked in 'The Enigma of Kasper Hauser', by a doctor trying to assess the sanity of Kasper. The answer about the tree-frog is perfectly correct in that case, thouhg as it doesn't obey the strict logical form expected, poor Kasper is adjudged incapable of logical thought. Next time i'll read the OP more carefully ------------------------------------------------------- Just because you know a japanese word doesn't make you intelligent
diabolic clone Anomaly Collective	Posted - 2008.06.18 20:18:00 - [36] Since both doors are both the same and the prisoner knows about them he should ask one sentinel if the door is a different shape than it looks. Since most are rectangular he asks if it is circular. Then find the nearest pub, because the liar will agree with you and the truthful one will not.
Shinnen Northern Intelligence	Posted - 2008.06.18 20:35:00 - [37] The real question that was asked: "Are you able to tell me a really lame riddle?" Because the only cool riddles are the ones with "who am I?" -- Banned since 2005, back by popular demand! They said it wouldn't happen!!
Micheal Dietrich Terradyne Networks	Posted - 2008.06.18 20:36:00 - [38] Originally by: diabolic clone Edited by: diabolic clone on 18/06/2008 20:28:06 Since both doors are both the same and the prisoner knows about them he should ask one sentinel if the door is a different shape than it looks. Since most are rectangular he asks if it is circular. Then find the nearest pub, because the liar will agree with you and the truthful one will not. edit: Assuming the liar guards the door to the hangman. Otherwise just ask one sentinel if he's a can speak. That's why you ask one guard what he thinks the other guard will say about where door A goes. <you point to door A> You <to guard A>: What would the other guard say if I asked him where this door goes? Guard A: He would tell you that it goes to freedom. You: Thank you. <You walk out Door B> Answer: If Guard A is truthful: He knows guard B would lie about the door and give you the honest answer about what guard B would say. If Guard A is a liar: He certainly wouldn't give you the proper answer which would lead you to your doom. The object is to get the same answer from 2 people. Originally by: El'tar I WOULD WARRIOR FOR WOMAN BELONG TO ME!
Diana Merris Pator Tech School	Posted - 2008.06.18 20:46:00 - [39] I'm ashamed of you people! No one has mentioned that this was in a Tom Baker Doctor Who episode. The one with Sutehk the Destroyer the robot mummies.
dreamsequencer Freelancer Union Unaffiliated	Posted - 2008.06.21 10:20:00 - [40] Originally by: Diana Merris I'm ashamed of you people! No one has mentioned that this was in a Tom Baker Doctor Who episode. The one with Sutehk the Destroyer the robot mummies. This riddle is older than Dr. Who --- Dulce et decorum est pro patria mori The Universal Migrator ---
VyKer1 State War Academy	Posted - 2008.06.21 12:13:00 - [41] I am old. The question to ask is... "If I asked the other sentinel which door leads to death, which would he say?" and then take that door.

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