The entire point was that we do not understand it? That much of how the brain work is "magic" atm.
It's our field that are the alchemist mystics, rambling about AGI/Philosopher's Stone in ever increasingly unhinged ways, while stirring our ML-pots that we have never even tried to prove have a chance to be anymore successful than the alchemists.
Visarga used the word literally and stated in broad strokes what the brain does (process input, update state, emit outputs) without the details of how it does so. You're the one who misinterpreted that as meaning we already know exactly how the brain works.
