My Hypothesis: All matter exists in a sphere of probability. Our brains are masters of computing probabilities to tell us the most likely ___location for any object. It is not that we collapse the wave form, but that our brain ignores the wave form for our convenience.
Light is always a wave, never a particle. And a wave is just a probability.
Do you account for the fact that probability distributions can have multiple peaks with equal probability? If multiple brains were involved, they'd somehow have to coordinate on what they deem the most likely outcome.
Say there is a quantum system – a particle or something – that has an equal probability to collapse in either of two classical states if measured. Say there are two scientists in a laboratory who perform a measurement on that system. If your hypothesis is true, how do they agree on what they perceive when looking at the result of the measurement? Each brain would have to make an arbitrary decision on which of the two equally likely outcomes to perceive.
Well, consider some of the political disagreements we've had in the last decade or so, we have ample evidence that two different people can look at the exact same thing and arrive at opposite conclusions.
The mind doesn’t experience a collapsed state, it is a collapsed state. And from that collapsed state, we experience all other collapsed states through the same brain function.
The brain uses our senses to collect the probabilities that exist in the world, and the brain collapses those probabilities into a single “point”.
Light is always a wave, never a particle. And a wave is just a probability.