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5/ My reaction to @GaryMarcus's call for hybrid systems in that essay is that he doesn't sufficiently recognize that good hybrid systems will (1) represent P and Q in a distributed fashion, (2) *learn* P and Q and the form of their relationship. That's surely how brains do it.
“Surely” seems a bit strong here — what’s your logic? I did allow in the Medium essay for embeddings (distributed codes) as a way of representing instances of variables, said that was more modern than my 2001 proposal.
I think “surely” is appropriate here actually... On (1): that the brain uses distributed codes is well established empirically and not really a Q anymore, (2) Most relational reasoning is learned. There may be some relations or concepts that are innate, but they’re limited, IMO.
I would agree that most circuits in the brain are “learned”, yet they are endowed with intrinsic dynamics/properties that may be “innate” and favour mapping of specific sensory inputs / cog fctions. I know the brain is only 1 possible implementation, yet, fascinates me every day.
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