It appears to be the majority opinion that some quality of the impact of game systems prevents authoritative answers as to the impact of special in-character knowledge of the rules-as-metaphysics in a system-agnostic manner (i.e. in a general manner with specific differences between general system categories based of off general principles).
I currently disagree with this opinion, but am aware I am likely wrong because I do not understand this position at all. How and why does the impact of special in-character knowledge of the rules-as-metaphysics vary between game systems? If this is not possible to answer, what is it about system differences that makes no general theory of the impact of in-character knowledge formulatable? What prevents these issues from being overcome?
The question "How does a post-modernist cosmology affect a game?" is not answerable because different rule systems behave so erratically different (i.e. they form a chaotic system) that either no possible unifying principle can be applied or such a principle would require more effort than it is appropriate to ask for from this site (this is a reasonable position). I don't understand why or that this is the case. Explain.