>>14136542Fun fact, set theory-fags can't answer this without axioms.
But really, "infinite" in this sense just means not finite. Finite just means if you collect a bunch of things and count them, you'll eventually finish, even if you have to defy death and halt the heat death of the universe. But if you can always point to another object and say, "you missed that one", then the requirement to be "finite" is not met.
The naturals are not finite, since for any natural X, you can count up to X. The number of naturals you counted is finite. But I can always add 1.