Full Idea
If the concept 'Jocasta' needs to be distinguished from the concept 'Oedipus's mother', that's all right because the two concepts are connected with different properties.
Gist of Idea
'Jocasta' needs to be distinguished from 'Oedipus's mother' because they are connected by different properties
Source
Jerry A. Fodor (Psychosemantics [1987], p. 84)
Book Reference
Fodor,Jerry A.: 'Psychosemantics' [MIT 1993], p.84