I disagree about math and logic being somehow constrained by our lack of imagination or cognitive processes. However, I also don’t think that “existence” is a r

I disagree about math and logic being somehow constrained by our lack of imagination or cognitive processes. However, I also don’t think that “existence” is a real thing. What exactly is it supposed to mean? All else being equal, what is the difference between something that exists and something that doesn’t (but conceivably could exist)? The fact that we are able to perceive it in our universe? That would be a strangely subjective notion. The fact that it is part of the universe we live in? But the non-existent thing is part of its own universe that we just happen to not live in. So that reduces back to the subjective notion. It seems more parsimonious to me to not assume that there is a strange boolean flag “exists” attached to things, and that everything logically possible just is, and we are merely part of the logically possible things.