Don't make the cross into idealism. That shit's deadly. Idealism fails to recognize that it doesn't have the whole picture. It assumes ALL when SOME is all that is known. That is a fallacy.
Discussion
The rest of the ideas here presented are quite cool and actually mesh with or even are identical to my own philosophy. He just misses the consensus formation in absence of people part and the respecting the fact that our framework of understanding things, our lens, may be the thing determining the truth of a statement in a way meaningful only in so much as that language or framework applies coherently. It does not change the meaning within another framework by the magic of words or percepts.