Its rather surprising to me that you're asking this in a thread about the strongest evidence we have for cognition being biochemical.
The evidence is that action of psychoactive drugs, especially psychedelics and anaesthetics. We have compounds that we have studied that actions of and they act on neurons and their networks to alter or eliminate cognition.
The evidence is that action of psychoactive drugs, especially psychedelics and anaesthetics. We have compounds that we have studied that actions of and they act on neurons and their networks to alter or eliminate cognition.