

Object permanence is technically an axiom. The idea that things exist even when we aren’t observing them.
There’s also a problem with terms, particularly related to quantum mechanics. It uses the term observer. To a layman, that’s a person watching. To a scientist its any collection of atoms/fundamental particles that can cause the quantum waveform to collapse.
The results of the axiom are that things do exist when we are not observing them. Our observations don’t back propagate to retroactively bring them into existence. We can’t prove that however, though it’s fundamental to a lot of science making sense (quantum mechanics being the oddball).










One of the goals is to minimise them. Most of those left are blindingly obvious, but unprovable. They are technically there, but just part of the base assumptions of the models.
E.g. we couldn’t do science if an all powerful being was deliberately messing with our results. We also can’t prove the universe isn’t a computer program, only rendering what a “conscious” entity is looking at, while back calculating the required history on the fly.