Labyrinth Puzzle
Permanent link to this comic: http://xkcd.com/246/
Image URL (for hotlinking/embedding): http://imgs.xkcd.com/comics/labyrinth_puzzle.png
[[Three guards with spears stand in front of three doors. A man wearing a hat and another man stand in front of the guards]]
Man with hat: And over here we have the labyrinth guards. One always lies, one always tells the truth, and one stabs people who ask tricky questions.
{{title text: And the whole setup is just a trap to capture escaping logicians. None of the doors actually lead out.}}