Full Idea
It's an embarrassment for attempts to construct content from functional role that quite different sorts of mental states can nevertheless share their contents.
Gist of Idea
Very different mental states can share their contents, so content doesn't seem to be constructed from functional role
Source
Jerry A. Fodor (Psychosemantics [1987], p. 70)
Book Reference
Fodor,Jerry A.: 'Psychosemantics' [MIT 1993], p.70
A Reaction
That is, presumably, one content having two different roles. Two contents with the same role is 'multiple realisability'. Pain can tell me I'm damaged, or reveal that my damaged nerves are healing. Problem?