Full Idea
In the debate in cognitive science on the nature of mental imagery, there is a 'depictivist' side (Johnson-Laird, Kosslyn, Shepard - good images are isomorphic), and a 'descriptivist' or 'propositionalist' side (Pylyshyn and others).
Gist of Idea
Should we take the 'depictivist' or the 'descriptivist/propositionalist' view of mental imagery?
Source
Robert Hanna (Rationality and Logic [2006], 6.6)
Book Reference
Hanna,Robert: 'Rationality and Logic' [MIT 2006], p.194
A Reaction
Hanna votes firmly in favour of the first view, and implies that they have more or less won the debate.