On 4/7/2017 3:22 PM, Bruno Marchal wrote:
As I remarked before, it is as if consciousness were concealed from the outside by a two-part public/private encryption scheme. Whereas the public part is in principle entirely extrinsically inspectable the decryption can be completed only in terms of the private perspective of *the system in question*. This then inevitably entails that decrypted messages of this kind must be inter-subjectively incommunicable despite the ultimate irony that they amount to the entirety of inter-subjectively "shareable" concrete reality. It is of course in this sense also that the brain is secondary to consciousness: i.e. that self-referential perceptual apprehension is the filter through which a concrete reality, with all its brains and bodies, is enabled in the first place to emerge (and I do mean emerge in a strong sense). That primary "grasp on reality" is what enables any subsequent abstract analysis in terms of a reductive "bottom up" physical mechanism playing the role of a locally-dominating computational mechanism (or IOW what you have termed the reversal of physics and machine psychology).
But what, in the computations of the UD, is "perceptual apprehension"? Bruno says that the physical world in not computed, the way some people speculate that "we are a simulation", but only thoughts are computed and the physical world is inferred. I agree that the physical world is inferred from those perceptions that have point-of-view-invariance as my friend Vic Stenger called it. But I don't see how a POVI subset of UD computations can just be picked out by some anthropic principle. ISTM they must have some computed unity independent of conscious thoughts (which must be a subset of zero measure).
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