Phi June 6, 2012 June 6, 2012 But that defeats the riddle. I know the old riddle where it was simpler, you just asked one guard about what you already know. Then you added that they could be in front of either door. And now they don't know about each other. That makes the riddle impossible. The older version of the riddle only had one answer, adding more rules doesn't work. The answer is either going to go against one of your many new rules, or it's just going to be "hurr there are signs on the doors saying which is which." The original version had it so you could only ask one question. The version where you can ask multiple questions is a simpler version meant for younger solvers. There are multiple answers to the original version, though. And I can promise you that the answer does not conflict with the rules, nor does is it an illogical answer you would expect from a child's riddle. Ask one of the guards, "Are you going to answer this question with yes if everything you say is true?" Then if the guard's head explodes you know he is the guard who answers truthfully. That is the exploding-head case. Puzzle solved. I don't get that. Both guards can say 'yes' to that without causing a paradox: The truthful guard can say yes because by saying yes he is telling the truth when he says that he will say yes. The lying guard can just lie and say yes.
Avalanche June 6, 2012 June 6, 2012 Ok. So you can't ask a guard what's in the door because both will give the same answer. You can't ask a guard about another guard because they are autistic. You can't know what guard is where, and what guard is in front of which door, as you only have one question. That rules out a lot of questions man. This is either a really good riddle or you fucked up somewhere and it doesn't actually make sense. frt
Virgil June 6, 2012 June 6, 2012 The tulpa comes to one of the guards and asks: Is the guard who always tells the truth guarding the door that leads to the nice old man? If the guard says yes, the tulpa will go through that door. If he says no, the tulpa will go through the other door. I think there are two possibilities of the arrangement of the guards in front of the doors. This approach should work for both of them. Bayesian inference
Guest Albatross_ June 6, 2012 June 6, 2012 The tulpa comes to one of the guards and asks: Is the guard who always tells the truth guarding the door that leads to the nice old man? If the guard says yes, the tulpa will go through that door. If he says no, the tulpa will go through the other door. I think there are two possibilities of the arrangement of the guards in front of the doors. This approach should work for both of them. It won't, because neither of the guards know about the other.
Phi June 6, 2012 June 6, 2012 Ok. So you can't ask a guard what's in the door because both will give the same answer. You can't ask a guard about another guard because they are autistic. You can't know what guard is where, and what guard is in front of which door, as you only have one question. That rules out a lot of questions man. This is either a really good riddle or you fucked up somewhere and it doesn't actually make sense. It's a good puzzle is all. I've only seen one or two people actually solve it. The tulpa comes to one of the guards and asks: Is the guard who always tells the truth guarding the door that leads to the nice old man? If the guard says yes, the tulpa will go through that door. If he says no, the tulpa will go through the other door. I think there are two possibilities of the arrangement of the guards in front of the doors. This approach should work for both of them. What guard?
Avalanche June 6, 2012 June 6, 2012 The tulpa comes to one of the guards and asks: Is the guard who always tells the truth guarding the door that leads to the nice old man? If the guard says yes, the tulpa will go through that door. If he says no, the tulpa will go through the other door. I think there are two possibilities of the arrangement of the guards in front of the doors. This approach should work for both of them. If the guard says yes, he could be the truthful guard and thus get the good door, or he could be the lying guard in front of the bad door. If it's the truthful guard in front of the bad door he will go to the good door, but if it's the lying guard in front of the bad door he will go for that door. frt
Guest Albatross_ June 6, 2012 June 6, 2012 Either? Try specifying the question. Read the original puzzle.
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