Behavioral and Brain Sciences

Open Peer Commentary
van Gelder: The dynamical hypothesis

All information processing entails computation, or, If R. A. Fisher had been a cognitive scientist . . .

Eric Dietrich a1 and Arthur B. Markman a2
a1 Department of Philosophy, Binghamton University, Binghamton, NY 13902 [email protected]
a2 Department of Psychology, Columbia University, New York, NY 10027 [email protected]


We argue that the dynamical and computational hypotheses are compatible and in fact need each other: they are about different aspects of cognition. However, only computationalism is about the information-processing aspect. We then argue that any form of information processing relying on matching and comparing, as cognition does, must use discrete representations and computations defined over them.