Explain the Ship of Theseus in simple terms.
The Ship of Theseus is a thought experiment that raises the question of whether an object that has had all of its parts replaced is still fundamentally the same object.

The story goes like this: Theseus, the mythical founder-king of Athens, had a ship that he sailed on many adventures. Over time, the ship's wooden parts deteriorated and were replaced one by one. Eventually, every part of the ship had been replaced with new wood.

The question then arises: is the ship that Theseus sailed on still the same ship after all the replacements? Or is it a completely different ship, since none of the original parts remain?

This thought experiment can be extended to other objects, such as a car or a human body, and raises interesting philosophical questions about identity and change over time.
I don't understand why my philosophy teacher insisted on this. What good is it to learn this ?