Full Idea
It is the essence of semantic externalism that there is nothing that you have to believe, there are no inferences that you have to accept, to have the concept 'elm'.
Gist of Idea
Semantic externalism says the concept 'elm' needs no further beliefs or inferences
Source
Jerry A. Fodor (The Elm and the Expert [1993], §2.I)
Book Reference
Fodor,Jerry A.: 'The Elm and the Expert' [MIT 1995], p.37
A Reaction
[REMINDER: broad content is filed in 18.C.7, under 'Thought' rather than under language. That is because I am a philospher of thought, rather than of language.