  According to the Use/Identity theory, (6), when spoken, is grammatical (Washington 1992, pp. 588–90). There are no missing (or implicit) quotation marks. When uttered by a person whose name is ‘Donald’ it is true (if ‘Donald’ is used quotationally). The function of quotation marks in written language is simply to indicate that words are being used in this special, quotational, way, i.e. not (only) with their regular extensions. In other words, ‘Donald’ can be used in two different ways: with its usual semantic value (its regular referent) or quotationally. In the latter case, its semantic value is an expression.