Did you hear about the philosopher who displeased the King?
The King was so displeased that he told the philosopher that he would have him executed (shot) during the course of the next seven days. The King told him that in order to add to the punishment he absolutely guaranteed that the philosopher would not know the actual day of his execution.
Sitting in his prison cell the philosopher reasoned as follows;
"Hmm" he thought, "The king could not execute me on the seventh day because if I have not been executed by the end of the sixth day then it would need to happen on the seventh day and this would mean I would know the day of my execution. The king always keeps his word so I can't be executed on the seventh day."
The philosopher was becoming more optimistic by the minute.
"In fact the King can't execute me on the sixth day either because if I am not executed by the end of the fifth day then I would know he must do it on the sixth day so I would know the day of my execution and he can't break his guarantee."
The philosopher was becoming positively cheerful now as he followed his cast iron line of reasoning.
"Hmm .. the same line of logic leads me to conclude that he can't execute me on the fifth day either. In fact by following this line of reasoning I can logically show the king can't execute me at all if he keeps his guarantee."
What should we make of the philosopher's line of reasoning and his conclusion that he could not be executed as long as the King kept to his guarantee?