 Of all the proposals that scholars have given, Ackrill’s is the most supported by Aristotle’s texts, though the evidence he cites is far from conclusive. But from a philosophical point of view, the question method suffers from some serious problems. First, it is far from clear that either method actually produces Aristotle’s list. Suppose, for instance, I employ the second method and ask: does Socrates like Plato? The answer, let us grant, is ‘yes’. But where does that answer belong in the categorical scheme? Ackrill might respond by forcing the question to be one that is not answered with ‘yes’ or ‘no’. But we can still ask the question: is Socrates present-in or not present-in something else? The answer, of course, is: not present-in; but where in Aristotle’s list of categories does not present-in belong? It is indeed hard to see. Similar problems face the first method. Suppose I were to ask: what is Socrates’ whiteness? I might respond by saying ‘a particular’. Again, where does being a particular belong in Aristotle’s list of categories. Of course, particulars are part of the four-fold system of classification that Aristotle articulates. But we are not at the moment concerned with that scheme. Indeed, to advert to that scheme in the present context is simply to re-open the question of the relations between the two main systems of classification in the Categories.