Right so, by step 4 I’m not trying to assume that h is computationally tractable; the homomorphic case goes to show that it’s probably not in general.
With respect to C, perhaps I’m not verbally expressing it that well, but the thing you are thinking of, where there is some omniscient perspective that includes “more than” just the low level of physics (where the “more than” could be certain informational/computational interconnections) would be an instance. Something like, “there is a way to construct an omniscient perspective, it just isn’t going to be straightforwardly derivable from the physical state”.
Right so, by step 4 I’m not trying to assume that h is computationally tractable; the homomorphic case goes to show that it’s probably not in general.
With respect to C, perhaps I’m not verbally expressing it that well, but the thing you are thinking of, where there is some omniscient perspective that includes “more than” just the low level of physics (where the “more than” could be certain informational/computational interconnections) would be an instance. Something like, “there is a way to construct an omniscient perspective, it just isn’t going to be straightforwardly derivable from the physical state”.