minkwe wrote:gill1109 wrote:He means more than deterministic. He means that after you have conditioned on the values taken by the hidden variables in any particular case, everything else becomes deterministic.

That's what deterministic means.

Yes, but note that he’s not referring to the quantum state. The idea is that the quantum state is just a statistical collective of underlying (hidden) states, for each of which deterministic rules apply. Linearity of certain expectation values (linearities predicted by QM) might hold ‘on average’ without it holding within each hidden deterministic state separately.