There is a saying that "
the only constant is change".
This is often attributed to
Heraclitus of Ephesus (Ancient Greek philosopher) (from Plato) as "
everything changes and nothing remains stil,2l; and you cannot step twice into the same stream."Saying:
No man ever steps in the same river twice, for it's not the same river and he's not the same man.
When, exactly, are two things "equal"?
When did something begin to "exist"?
What caused that something to begin to "exist"?
Example paradox: ship of Theseus
What about digital copies? What about military units and soldiers, naval ships and crews, sports teams and players, etc.? How about the universe?