Forgive my lack of knowledge, I don't have a great understanding of this. also think this is possibly more of a philosophy question. Been kinda going down the rabbit hole of the whole "The universe isn't locally real" thing, and am curious about one thing.

From what I understand, before something is measured, it exists in a superposition of probability, and then when measured it "chooses" one of these positions, and that means the universe is inherently random. But how can we truly ever know that theres nothing some factor of this decision that is just beyond our understanding?

I feel am just philosophically biased to a deterministic view, and the takeaway get is more that things are more complicated than original theories, butl don't really see this as any proof of deterministic vs non deterministic. How do we know that there aren't unmeasurable things that determine what is chosen? What if there is somne whole other layer "behind the scenes" that we can't interact with, but determines how these things play out?

It's kinda why I feel this might be a more philosophical question, since it's kinda just throwing out what ifs. Pitching the idea of a one way influential layer doesn't leave much room for counter argument, but am still curious to hear thoughts from a scientific perspective.

I just don't understand how we see this stuff as proof of randomness. How can we truly know what we don't know? I don't think we ever can. Although I still think the proof of what we can see happening very interesting, I just seem to disagree on the conclusion a bit.

Edit: Just wanted to specify I am absolutely not saying the universe IS for a fact deterministic, just that I don't think we can conclude it isn't also, because how can we be sure we truly understand the mechanisms of quantum mechanics to their absolute full extent?