In particle physics, the observer effect, in general use, refers to any effect caused by the act of observation. ... The Heisenberg's Uncertainty Principle states that the more accurately the momentum of a particle is measured the less accurately its position can be known & vice versa.
That is because you can't observe the momentum and position at the same time
in the same direction (they don't commute), but other things do commute. Specifically, the canonical coordinate and it's conjugate do NOT commute, but the coordinate operator "y" and canonical conjugate p_x commute.
[y, p_x] = 0
Which means there is no "uncertainty" or bound for observing with these two operators simultaneously. They have "infinite" precision.
What people often take away from uncertainty is that you can't know two things at the same time. In fact, you can (simultenaity), but those dimensions have to be independent, and usually perpendicular. Knowing the location of a particle on a line AND it's speed and mass (because mass is energy) on the same line is, of course, bounded, because we are restricted to one dimension, and momentum is a change in that dimension.
That is why two independent people seeing the alleged same thing, and disagreeing is such a serious issue. Both observe something; both spit out different "eigenvalues" of information, which suggests the wavefunction (what is creating what is being seen) is faulty, or the operator (human) is - or both. This is also likely why the Most High God demands at least two witnesses, and two for fellowship. Two independent operators that commute (same "eigenvalue" of information) provide for simultaneous verification.
The pen is blue, no matter how much you call it red. (Liars are faulty operators that spit out incorrect "eigenvalues" of information.)
So, it comes down to whether people believe other people they are taught to listen to, or if they trust themselves. It is very easy to deny what your eyes see when there is social pressure to "observe" what everyone else does.
