Full Idea
Some philosophers have thought that intentional states are exhausted by propositional attitudes, but what about mental imagery? You may have propositional attitudes to food, but I would wager that most of your thoughts about it are imagistic.
Gist of Idea
Propositional attitudes are not the only intentional states; there is also mental imagery
Source
John Heil (Philosophy of Mind [1998], Ch.6)
Book Reference
Heil,John: 'Philosophy of Mind' [Routledge 1998], p.212
A Reaction
Seems right. If I encounter an object by which I am bewildered, I may form no propositions at all about it, but I can still contemplate the object.