Theseus is dead. Long Live Theseus!
Theseus asked a good question: If a new ship has boards replaced as they rot away and eventually has not one original part remaining, is it still the same ship?
The answer is paradoxically yes and no, but the case for a ship and the case for a person, a living being with a mind and a sense of self, is somewhat different. Forget the ship. He was really asking if…