The Paradox of Ever-Changing Identity

If you replace every single board of a ship one by one, is it still the original vessel? This classic puzzle challenges our definition of what makes an object the same over time.

The thought experiment asks us to imagine a ship where parts decay and are swapped out until no original piece remains. If you then built a new ship from those discarded old parts, which one is the true Ship of Theseus? Philosophers have debated this for centuries to understand the nature of identity and existence. It forces us to ask whether things are defined by their physical stuff or by their history and form.