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#5741·Vincent Brunsch, 13 days agoI agree of course that consciousness, if computational, need not depend on neurons as a particular material substrate. But that is different from saying that the organization and activity implemented by those neurons tell us nothing.
The article you link makes this distinction itself: substrate independence means that most details of the substrate do not matter; what matters is the relevant pattern or structure of information processing. Studying homologous neural systems can give us evidence about exactly that organization and processing.
So my claim is not “they have similar neurons, therefore they have similar experiences.” It is that there is evolutionary continuity not only in the neural substrate, but also in how systems involved in sensory, nociceptive and affective processing are organized, what signals they process, and how they interact with other systems.
That seems evidentially relevant to what information processing is occurring. Substrate independence does not make that evidence irrelevant.
There’s also continuity in how MacBooks process information over the years, and how their hardware evolved, including ‘sensory processing’ like their cameras and microphones, yet none of them are sentient/conscious, and if one became conscious tomorrow, it would have nothing to do with its hardware and everything to do with its software.