A reckless explorer was captured by logic loving cannibals. He was brought before the chief and told, “You may now speak your last words. If your statement is false, we kill you slowly, and if your statement is true, we will kill you quickly.”
The man thought for a moment, then made his statement. Perplexed, the clever cannibals realized they could do nothing but let him go. What did the explorer tell them?
He told them, “You are going to kill me slowly.”
In this way, if the cannibals consider that the statement is true, then they will have to kill him quickly, but by doing this, the statement will become false.
On the other hand, if the cannibals consider that the statement is false, then they will have to kill him slowly, but by doing this, the statement will become true.