  Although the analysis of relational situations that Aristotle suggests in the Categories is perfectly general, it is clear from his later writings that he does not think that all relational situations conform to it. Thus, in the Metaphysics he claims that there are relational situations (such as Simmias’s thinking about Socrates) in which substances are related not in virtue of a pair of accidents, but rather in virtue of a single accident possessed by just one of the substances. “An object of thought [e.g., Socrates]” he says at one point “is said to be related because something else [e.g., Simmias] is related to  it”.[5]  And his point just appears to be that some relational situations are grounded in a single property or accident of a single relatum.