There is an old folktale that tells of the wise fool who arrives at the door of the king's castle asking for entry. He is immediately told by the guard that the king's decree is for anyone who tells a lie to be hanged. Then, upon asking for his destination, the wise fool replies, "I am going to be hanged." "I don't believe you!" exclaimed the guard, "you are lying." "Very well, then. If I have told a lie, hang me!" "But if I hang you," replies the guard, "then [...]