Mind/matter duality

[Angrboda]

The probability is equal to the square of the amplitude is a fundamental postulate of QM. Its interpretation may be several, but its calculation isn't. There has been a debate about "hidden variables", also called "non-locality" or the one I prefer, "spooky action at a distance". None of that ever panned out. Unfortunately, once in a while you'll get a title from some magazine or website, someone testing Bell's theorem, and indeed QM is weird, spooky action has reared its ugly head. But once you read the article, it's nothing but a quantum system violating Bell's theorem, which a QM system will do on theoretical grounds due to... guess what? Well, to the fact that probability is calculated differently in QM than in classical physics.

There was something in Nature communications last year where somebody was claiming that they'd demonstrated that conventional QM had as much or more predictive ability than any hidden variable theory. Me not being a physics person, sticking largely to philosophy, never followed up to determine whether that was a trustworthy result or not. (My physics knowledge and research skills, are, to be plain, poor.)

Do you know any more about it?