Full Idea
I call my conceptual role semantics 'non-solipsistic' to contrast it with that of authors (Field, Fodor, Loar) who think of conceptual role solipsistically as a completely internal matter.
Gist of Idea
Some regard conceptual role semantics as an entirely internal matter
Source
Gilbert Harman ((Nonsolipsistic) Conceptual Role Semantics [1987], 12.1)
Book Reference
Harman,Gilbert: 'Reasoning Meaning and Mind' [OUP 1999], p.206
A Reaction
Evidently Harman is influenced by Putnam's Twin Earth, and that meanings ain't in the head, so that the conceptual role has to be extended out into the world to get a good account. I prefer extending into the language community, rather into reality.