Ok, that's much clearer, and while I don't know if I agree with you completely, there's nothing you said that I object to.

I think confusion arose in the first place because you interpreted "platonic computation" to mean the denotational semantics of a computation, whereas Eliezer (and others) were using it to refer to the "abstract neural-network computation" as opposed to the "physics computation" involving wavefunctions and such, or the "physical world" with physical particles/wavefunctions (whatever that means).