The possibility of subisomorphic experiential differences

Palmer's main intuition pump, the "color machine," greatly underestimates t he complexity of a system isomorphic in color experience to humans. The neu roscientific picture of this complexity makes it clear that the brain activ ely produces our experiences by processes that science can investigate, the reby supporting functionalism and leaving no (color) room for a passive obs erver to witness subisomorphic experiential differences.