What is the fundamental nature of reality and existence?
I'm particularly interested in a physicist's take on this. Quantum mechanics is beyond my ken, but from what I can gather, the Copenhagen Intepretation of the primacy of the observer in the breakdown of the wave function is confirmed. That is to say, any system in relation to us is pure potentiality; an abstraction until we observe the system and consequently become "entangled" with the system and alter it by the process of observation.
This has several implications. The Copenhagen Interpretation along with other quantum phenomena, seem to have revived "dualism" even leaning towards actual "mentalism" given the primacy of the observer in existentialism. Paradocially, elements of "monism" are suggested by the "oneness" of all in the singularity and the fundamental "oneness" of the universe.
One of the most startling implications was expressed in Einstein's question to Bohr: [b]Do you really think the moon isn't there when you're not looking at it?" And this is the logical extension of observable phenomena, Schrodinger's Cat is indeed pure potentiality until observed. Reality being essentially, a cascade of wave function collapses contingent upon observation. This adds to the first cause question the first or universal observer problem. If there is a universal observer - ie God, - then the problem of infinite regress; observers all the way down; is solved. The universal observer is the primordial observer. But of course, many inconsistencies and paradoxes then arise from an omniscient observer and His effect or lackthereof in altering and entangling Himself in all systems by virtue of knowing about them. Can God know the exact position and momentum of a particle at the same time; time, not in the everyday or forward and linear sense we perceive it.
Edit: My last question is apocryphal as my understanding is, it's not meangful to ask the location and momentum at a "given time" for a number of reasons you're probably aware.
One of the times quantum phenomena reveal is the fact that there is no "ultimate reality" - all systems being relative and contingent. And spontaneous wave function collapse upon observation - giving new meaning to I think therefore I am - reality as we perceive it is a cascade of pure potential coming into existence upon observation. What special properties does the observer have to bring things into existence; to collapse the wave function? What inconsistencies arise in a system without a "first observer" or "ultimate observer" from whom all creation derives?