  (6) doesn't express a complete proposition on its own because ‘today’ does not have a complete sense on its own. Suppose that George held exactly one job, which he quit on 1 Aug 2000. (6) is then true as uttered on 1 Aug 2000 and false as uttered on any other day. Perry considers three Fregean accounts of the sense expressed by a use of ‘today’ in (6) and argues that they all fail. The first identifies the sense of ‘today’ with its role or character; the second identifies it with an equivalence class of ordinary Fregean senses; and the third involves looking to the beliefs of the speaker for its sense.