As always, there's a lot, and I'm quite stoned and otherwise intoxicated, so I'll pick this up when I'm more coherent.
Hold on a minute! Next time you're compos mentis, I want some insights into quantum decoherence - which I actually think from my limited understanding of it is wholly apposite to this thread of discussion too - it's basically part and parcel!
To bring the comment over from the other thread to keep this all focused:
The collapse of the wave function is an illusion; the wave function continues forever.
By observing the wave function, you don't collapse it, you become entangled with it
Nigh on completely irrelevantly, yet with some intriguing echoes, in my own field the early naive notions of observing the natives do their thing to learn what they do was eventually dismissed as being the product of intellectual supremacy, and the very act of observing the behavior of a group of people meant that you were changing how that group of people behaved; your presence became part of the act making it unlike all the prior acts where you, the observer, were absent thus defeating inferences and making any conclusions drawn either false or invalid. This then led to the idea of participant-observation which recognized that to describe what X group of people were thinking, doing, motivated by.... you had to do everything you could to immerse yourself in that situation as close to the manner in which they participated as you could. The only way to know someone else fully is to become that person - to become maximally entangled with them.