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