A prisoner is told, “If you tell a lie we will hang you; but if you tell the truth we will shoot you”. What can the prisoner say to save himself?
Answer
The prisoner has to say something so that the judge can’t keep his word. So, he has to say, “You will hang me.”
If his statement is true, he has to be shot, but then his statement will now become false.
If his statement is not true, he has to be hanged, but then his statement will now become true.