You are trapped in a room with two exits. One exit leads to certain death, the other leads to freedom. Each exit is guarded by a robot. One robot always lies and the other always tells the truth but you do not know which is which. You are allowed to ask one robot one question. What question do you ask and what door do you choose?
Would the other robot tell me if this door leads to freedom?
(I might have looked up the clip from Labyrinth before answering. And by might, I totally did. So blame Labyrinth if I'm wrong and not my horrible deductive logic skills.)