That pre-determined value idea is exactly local hidden variables, and Bell's inequality rules it out, Aspect's 1982 CHSH experiment measured the violation.

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caturopath an hour ago | parent | next [-]

To be precise, Bell's inequality rules out a local hidden variable theory. Pilot wave theories/Bohmian mechanics is an attempt to describe a nonlocal hidden variable theory of quantum mechanics.

	▲	antonvs an hour ago \| parent [-]
		To be even more precise, it rules out hidden variable theories that satisfy Bell locality, i.e. the assumptions that the theorem makes. Superdeterminism and retrocausality both allow for local hidden variables - it’s just that they don’t satisfy Bell’s assumptions.

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mono442 38 minutes ago | parent | prev | next [-]

it doesn't if you assume superdeterminism

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salsa_catsup 22 minutes ago | parent [-]

I don't understand the superdeterminism idea. Wasn’t that already the classical/Newtonian view - that everything was predetermined, a universe of billiard balls following their destiny exactly?

	▲	MattPalmer1086 14 minutes ago \| parent [-]
		Newtonian is just plain determinism. One thing causes another, but does not imply things are fixed in any particular way. Superdeterminism implies that things are fixed in advance in such a way that the things we "choose" to measure always looks as if there are no local hidden variables (e.g. Bell's inequality) even though there are.

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antonvs an hour ago | parent | prev [-]

If you saw that in section 15, the very next paragraph covers Bell.