the point of using qua-qualifications is to head off misunderstandings (some of which might have to do with parts and wholes, but some of which might not). This way of thinking about qua-phrases helps us to understand something puzzling that we saw earlier, namely, that Aquinas seems to say that qua-phrases are needed when we want to attribute to a person a feature that is suited by nature to belong to a person, but not needed when we want to attribute to a person a feature that is not suited by nature to belong to a person.
