> Does it make it any easier if we simplify the problem to: what is the human doing that makes (him) intelligent ?
Sure, it doesn’t have to be literally just the brain, but my point is you’d need very new physics to answer the question “how does a biological human have general intelligence?”
The claim that only dogs have intelligence is open for criticism, just like every other claim.
I’m not sure what your point is, because the source of the claim is irrelevant anyway. The reason I think that humans have general intelligence is not that humans say that they have it.
Sure, it doesn’t have to be literally just the brain, but my point is you’d need very new physics to answer the question “how does a biological human have general intelligence?”