User blog comment:Corbierr/Riddle Blog/@comment-4816103-20140912195308

There are two doors ahead of you, and two men by the doors. One door goes to heaven, the other hell; one man always tells the truth, and the other always lies. You don't know which door is which, or which man is which.

You can only ask one question to find out which door leads to heaven. What do you ask?