Bold claim that we actually know how our brains work. Neurologists will be excited to hear that we've cracked it. The ongoing work at openworm suggests there may still be some hurdles.

To my broader claim, chatgpt3 is just a massively complex version of Eliza. It has no self-generated semantic content. There's no mechanism at all by which it can know what it's doing. Even though I don't know how I'm thinking, I know I'm doing it. LLMs just can't do that and I don't see a route to it becoming an emergent thing via this route.