When I observe a person (observation causes the Wavefunction collapse of the subatomic particles that constitute the neurochemical architecture), I get a determinate picture of all there is to know about them.

But the apparatus I'm using to interact with the person (my brain) is also made up of the same subatomic particles that exist in the realm of probabilities.

Therefore, my expectations play a huge role in the process of determination. So, the whole collective consciousness is the subject object dynamic between all the sentient matter that exists in the universe. Plurality doesn't exist by itself. An individual cannot exist without another individual's opinion or expectation.