I Question about discussions around quantum interpretations

[Demystifier]

The question is whether those uncontrollable stochastic features are fundamental to the statistics of the outcomes? Standard QM allows us to ignore those, focus on the evolution of the isolated quantum state and by those calculations alone obtain the statistical outcomes that match experiment. That's the standard theory as I understand it.

I already said several times, but I will repeat. Those uncontrollable stochastic features are not important for computing the probabilities of the outcomes. Nevertheless, they may be important for explaining randomness, for otherwise it is hard to explain why simple isolated systems don't show randomness. It is a part of the standard theory that random outcomes only appear when there is decoherence caused by the environment.

 

[A. Neumaier]

It is a part of the standard theory

In this case you'd quote (in words) a standard reference for the questionable 'only' part of this claim!

that random outcomes only appear when there is decoherence caused by the environment.