If there is no Real World Out There, and all of the perceived existence is created by each viewpoint simply by the act of observation – as is one of the interpretations of Quantum Mechanics – then there follows a Synchronization Problem.
A subjective reality theory would form a basis for a Theory of Everything where every viewpoint creates what that viewpoint sees. There is no spoon. The spoon is created by me as I see it, the spoon is created by you as you see it. There is no spoon existing on its own – there is just each and every one’s image of that spoon that each and every one experiences.
And reality seems to be discrete and thus the images of reality is created every Planck second like frames in a motion picture.
Now how comes any changes that I make in my view is immediately reflected in every other’s view of reality? This is the problem of synchronization. Why do we see the same?
One answer could be that the premise is wrong and that there is a Real World Out There, that matter exists independent of viewpoints, will or observation. If so, it would give rise to the task of accounting for free will if such in fact exists. But if the premise is right, then there is a deeper understanding needed in order to solve the Synchronization Problem.
This enigma is one of my main philosophical conundrums at the moment.
Care to pitch in with viewpoints?