A related claim, which I have sometimes heard made, is the following: whatever may be the case for ordinary language, scientific language should not admit such expressions as 'there is someone I believe to be a spy,' and presumably related ones such as 'the object has been identified,' 'we know which it Dennett's paper shows that he is quite serious in saying that psychology, once it is worked out, will eliminate many of these notions about belief and reference and dissolve the associated puzzles.