This project is concerned with how and when the distinction develops between verbal reference to objective facts and verbal reference to mental states.

This problem led Frege to distinguish between the sense and reference of a word.

Saul Kripke examined the relation between sense and reference in dealing with possible and actual situations.

This is something between cliché, literary reference and classical allusion when you put it so baldly, which O'Neill does not.

The conjunction 'and' indicates a crucial aspect of the novel's method since it nicely balances between literary and non-literary reference.

Hence Frege recognized, as early as 1891, that Husserl distinguished between sense and reference.

Russell rejects Frege's solution of distinguishing between sense and reference.

Frege set about to resolve this problem, among others, with his famous distinction between sense and reference.

Of greatest importance is Frege's distinction between reference and sense.

Frege had argued, employing his distinction between sense and reference, that such sentences,were meaningful but neither true nor false.