You are trapped in a dungeon, and see two doors in front of you. One is a way out, andther will lead to certain death.

Two people are standing in front of these doors, one of them a Knight, another - a Liar. Naturally, you do not know who is who, but they know each other's true nature.

Both the people know which way is correct, but you can only ask one question of one of them before making your choice. What will you ask?

Obviously ask what would the other guy say.

The liar would lie. If he told the truth he would have said Door A, assuming that it is the right way. But he will lie and say Door B.

The truthful Knight would tell the truth. Du. But we are talking about a liar, and that he would lie. So the liar would choose the wrong way (Door B, assuming it is the wrong way). Then the knight would have to say that.

You end up with both of them saying Door B, they are both lieing, even though the Knight always tells the truth. You just forced him to lie by refering him to the lier.

Man... no one had the time to explain it out! Everyone just said. What would the other guy say... No explaination!

Posted by ron on 2004-12-31 17:13:47