Behavioral and Brain Sciences

Open Peer Commentary
Palmer: Color and consciousness

An externalist approach to understanding color experience

Peter W. Ross a1
a1 Department of Philosophy, California State Polytechnic University, Pomona, Pomona, CA 91711


Palmer demarcates the bounds of our understanding of color experience by symmetries in the color space. He claims that if there are symmetries, there can be functionally undetectable color transformations. However, even if there are symmetries, Palmer's support for the possibility of undetectable transformations assumes phenomenal internalism. Alternatively, phenomenal externalism eliminates Palmer's limit on our understanding of color experience.