Hidden-variable theory

All this is in principle predictable from quantum theory and is not overly sensitive to the initial conditions. What makes it hard to predict that in such experiments the outcome will always be the same is that doing so requires inordinately large amounts of computation.

Aharonov and his colleague Jeff Tollaksen write that time-symmetric reformulations of quantum mechanics change the meaning of uncertainty from ‘capriciousness’ to exactly what is needed in order that the future can be relevant to the present, without violating causality, thereby providing a new perspective on the question ‘Why does God play dice?’