Full Idea
The identity of the content of mental states does not ensure the identity of their extensions.
Gist of Idea
Mental states may have the same content but different extensions
Source
Jerry A. Fodor (Psychosemantics [1987], p. 45)
Book Reference
Fodor,Jerry A.: 'Psychosemantics' [MIT 1993], p.45
A Reaction
Obviously if I am thinking each day about 'my sheep', that won't change if I am unaware that one of them died this morning. …Because I didn’t have the precise number of sheep in mind.