Not necessarily. In principle, there could exist a super-deterministic theory that predicts phenomena that QM does not. None has been invented so far, but in ge

Not necessarily. In principle, there could exist a super-deterministic theory that predicts phenomena that QM does not. None has been invented so far, but in general the idea of super-determinism has received little attention, so that is not surprising. This may (or may not) change with work by Gerard t'Hooft and others.