  So far, then, we have seen that medieval philosophers are committed to recognizing at least one type of non-paradigmatic relational situation—namely, those involving a pair of substances and a single accident inhering in just one them. As we might expect, medieval philosophers disagree about the precise nature of the accidents involved in these situations—with reductive realists identifying them with ordinary, non-relational accidents, and non-reductive realists identifying them with accidents of a sui generis type.