"Astrologer's Shrewd Answer" joke
A medieval astrologer prophesied to a king that his favorite mistress would soon die. Sure enough, the woman died a short time later. The king was outraged at the astrologer, certain that his prophecy had brought about the woman's death. Word spread through the kingdom and soon got back to the astrologer.
The King summoned the astrologer and commanded him: "Prophecy, tell me when you will die!"
The astrologer realized that the king was planning to kill him immediately, no matter what answer he gave. But then, he thought of the most brilliant answer that would not only insure his immediate future, but would keep him safe and prosperous for years to come.
"I do not know when I will die," he answered finally. "I only know that whenever I die, the king will die three days later."
Not enough votes...