Behavioral and Brain Sciences

Open Peer Commentary
Edelman: Representation of similarities

The notion of distal similarity is ill defined

Ulrike Hahn a1 and Nick Chater a1
a1 University of Warwick, Coventry CV7 4AL, United Kingdom u.hahn,


We argue that the notion of distal similarity on which Edelman's reconstruction of the process of perception and the nature of representation rests is ill defined. As a consequence, the mapping between world and description that is supposedly at stake is, in fact, a mapping between two different descriptions or “representations.”