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Behind This Door Lies a Large Stunning one Bedroom Apartment - Puerto del Carmen
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After a long time you decide that the guard doesn't answer because it can't. You then go to the door you didn't point at, and right when you just pushed down the handle, you hear the guard answering. Emrakul provided the only answer that is close to the way I would explain this riddle solution. Others are violating one or more the original premise or just off base in general. Especially Kevin and Rafe which obviously just convinced themselves was ok, LOL, which guard is the honest one and which is the liar is obviously not something you know, it says right in the riddle explanation, but your answer depends on it.
I'm really scratching my head and wish you two the best. The answer, same concept as Emrakul, in other words: Go to either guard. Ask that guard, "Which door would the other guard say is the safe route". This answer, regardless of which guard you ask will allow you to choose the door opposite of either guard's answer and always lead you safely. If the question Q in this case, "Is this the dodgy door" were to be answered with the same truth or falsehood as you are about to answer this question, would the answer be "yes" or maybe "pish" if you can remember that this is a native word for "yes" or "no" without exactly recalling which?
If he answers "yes" or "pish" then it is the dodgy door irrespective of whether he's a truth teller, a liar, a take your pick, or whether he actually knows the answer and, where applicable, whether "pish" means yes or no. If he answers no or "tush" then it isn't. The question is either an on or off pulse, and the answer is also an on or off pulse which we interpret as pointing to a door. So they both point to the death door. These rules create a situation where there is no method for discerning one guards' honesty from the other, and thus which door leads to freedom.
It's common that you might find some difference in 2 doors. So the prisoner chooses one door with a color red for say and asks this question to one of the guards. If he asks this question to the truth speaking guard he will correct the prisoner over the color of the gate and will tell the true answer. Instead if he asks to the false speaking guard he will not rectify his false statement over color of the door and so he will tell his wrong answer.
Difference in color is mere an assumption,some other difference in gates could also be used in the question. Even though the most common answer has been posted I would like to add an answer that a friend of mine gave me when I asked him this question. I had never heard this answer before and this is why I would like to share it.
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If you ask any guard, "is the truth telling guard standing in front of the door that leads to freedom? If he says yes you simply go through that door. The mechanics are more or less the same in this answer but for some reason it took me a long time to convince myself it worked every time. The answer to this riddle is to merely pose an single interogative that completes a simple alternating composite of positive and negative interdependent propositions.
By stringing the propositions you can determine the door to freedom by posing the question so that the answer successfully or unsuccessfully completes the alternating polarity.
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Regardless of how you pose the question the polarity must alternate [negative, positive, negative with the answer providing the last swing back to positive] or [positive, negative, positive with the answer providing the last swing back to negative] to be successful. If and when it does not alternate, that will indicate the required action just as definitively as when and if it does successfully alternate.
Below, I will pose the question with the corresponding polarity; keep in mind that your question can utilize either door and either guard; to wit: - Would you be telling the truth [positive], if you said that he would be lying [negative], if he said that this door is the door to freedom [positive]? Notice, [positive, negative, positive]. If the guard you directed the question to answers "NO" [negative], you have completed the correct alternating polarity, [positive, negative, positive,negative] and the door to freedom is the door you did not point out.
Notice [Negative, positive, negative]. If he answers Yes [positive], you have again completed the alternating polarity correctly and your door to freedom is the one you pointed out. In either case, if the polarity does not correctly alternate, you should proceed as indicated from the context of your interrogative. Thank you for your interest in this question.
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Home Questions Tags Users Unanswered. Two doors with two guards - one lies, one tells the truth Ask Question.
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Asked 5 years, 1 month ago. Active 12 days ago. Viewed k times. What do you ask so you can pick the door to freedom? Wen1now 6, 2 2 gold badges 26 26 silver badges 81 81 bronze badges. Rafe Rafe 3, 3 3 gold badges 23 23 silver badges 45 45 bronze badges. Aza Aza As opposed to trying to deceive you. There is more to lying than words - there is body language. I forgot my :- I've been thinking about questions like this along the line of a prisoner's dilemma and not only as a matter of a logic puzzle.
What door would the other guard point to? The reason this works is because the answer reveals the integrity of BOTH guards. Enter his door if he says "yes" and enter the other door otherwise. If you choose the liar, he will lie about what his reply would be. Since that reply is also a lie, the two lies cancel out.
Kevin Kevin 6, 1 1 gold badge 25 25 silver badges 30 30 bronze badges. But any question that distinguishes between the doors would work as the "inner" question. For example, 'is the door on the left the freedom door?
If you ask the honest guard and he says "yes", you pass through his door safely. If you ask the honest guard and he says "no", you pass through the other door safely. If you ask the liar guard and he says "yes", you pass through his door safely. If you ask the liar guard and he says "no", you pass through the other door safely. Where's the danger?
The goal is to find the correct door.