> impossible to know anything about a universe that doesn’t include our perception of it
The optimistic take for me is that this is a fundamental feature of the Universe.
The optimistic take for me is that this is a fundamental feature of the Universe.
If by know we mean prove, then we can know things in other universes that may or may not exist by creating axiomatic systems that don't match our own. If we mean know as believe to the core (such as believing the mechanics of a proof) than we can know many things, some which may be true but unprovable or may simply be false.
I can say I'm aware of neutrinos and believe they exist as formulated, but couldn't say they absolutely exist in our universe. Earlier models only turned out to be approximations.