 Like Burley, Sharpe’s semantics lists a third kind of expression between simple and complex expressions: concrete accidental terms (like ‘white’ or ‘father’), whose significata are neither simple nor complex objects but something in between. He affirms that concrete accidental terms do not signify simple objects but aggregates composed of a substance and an accidental form. Such aggregates are lacking in numerical unity, and hence do not fall into any of the ten categories, because they are not properly beings (entia). For that reason concrete accidental terms, although simple expressions from a merely grammatical point of view, are not names. The two metaphysical components of such aggregates (i.e., substance and accidental form) are related to the concrete accidental term as follows: although the concrete accidental term connotes the accidental form, this is not its direct significatum, so that the concrete accidental term can supposit for the substance only. In other words, the concrete accidental terms label substances by means of the accidental forms from which they draw their names, so that they name substances only qua bearers (subiecta) of a form. This fact accounts for the difference between general names in the category of substance (like ‘man’) and concrete accidental terms. General names in the category of substance are concrete terms as well, but the form they primarily signify is really identical with the substances they label. Therefore, in this case, the name itself of the form can be used as a name of the substance. This obviously implies a slight difference in meaning between abstract and concrete substantial terms, such as ‘humanity’ (‘humanitas’) and ‘man’ (‘homo’). While ‘humanity’ is not the name of the form considered in its totality, but rather the name only of the essential principle of the form, that is, of the intensional content carried by the term ‘man’, this latter term signifies the substantial form considered as a constitutive element of the reality (esse) of a certain set of individual substances that instantiate it. As a consequence, according to Sharpe, ‘man is humanity’ (‘homo est humanitas’) is a well formed and true sentence, since both subject and predicate signify the same entity, but ‘white is whiteness’ (‘album est albedo’) is not, since ‘white’ does not directly signify the accidental form, but only the substrate in which it inheres, as bearer of that form, and therefore ‘white’ cannot stand for such a form in any sentence (ibid., pp. 71–73).