It seems to me a lot of what quantum mechanics is essentially saying is that "causality of any given event is equal and opposite to the causing event" - leading to entanglement. This is in some way analogous to the Newton's laws of "action and reaction are equal and opposite". What I mean is that generally the so-called observer that caused the experiment to happen is also been influenced in some equal and opposite way by the observed event and therefore is inextricably "entangled" with the experiment by this causality law. So if you are a fan of the movie "the matrix" the merovingian that laced the lady's drink with something in the matrix world to set of a chain reaction did not realize, perhaps he is somehow also influenced in some equal and opposite way by that event that he thought he caused... who was the one really causing things to happen? Anyways I digress a bit, pardon moi. This causal symmetry would then apply to any "non-conscious" systems as well that influence each other in a symmetric fasion in equal and opposite ways. However, I also hypothesize that what we call "mind" or consciousness is a unique entity that is not governed by this "equal and opposite" causality law. This "mind" is able to influence other entities ("physical world" or "outside universe") without being influenced *as much* in return (asymmetric), therefore it (the mind) is uniquely ***"closed"*** from a causal perspective relative to the "universe" out there. Sort of like unidirectional or semi-unidirectional gate for the flow of causality. The "flow" of causality is then more from the conscious entity (or "mind" or whatever you want to call it) to the outside universe than vice versa unlike other non-conscious systems in which causality goes equally in both directions. Lack of perfect causal symmetry between the mind and outside universe then leads to lack of perfect entanglement. This then leads to what we call the "wave function collapse" because the mind is no longer perfectly entangled with the outside physical world and forces the physical world to behave differently than it otherwise would when it interacts with non-conscious systems. This causal asymmetry may somehow also lead to the perception of the flow of time... This concept may then allow room for the idea of "free will" since consciousness is somehow causally insulated (at least partly) from the causal chaos in the surrounding universe or multiverse whatever you want to call it. Mere speculation but it's something I think is worth pondering and I'm using quite general, vague ideas rather than hard specifics.