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I personally believe in determinism and understand the basics of quantum mechanics, but don't see how any of it disproves that the universe is deterministic. Electrons cannot move change momentum or direction of momentum without an outside force, so its position cannot be changed without an outside force either. And if it does change, this should be predictable by the amount of energy and by the angle of the outside force. I don't think that a probability wave function shows randomness either. There should be reasons that electrons are more likely to exist at certain positions on a wave regardless of randomness.