 J.L. Ackrill (1963) is the most prominent defender of the Question Approach. He takes as evidence for his interpretation Aristotle’s remarks in Topics I 9. Ackrill claims that there are two different ways to generate the categories, each of which involves asking questions. According to the first method, we are to ask a single question — what is it? — of as many things as we can. So, for instance, we can ask of Socrates, what is Socrates? And we can answer — Socrates is a human. We can then direct the same question to the answer we have given: what is a human? And we can answer: a human is an animal. Eventually, this process of question asking will lead us to some highest kind, in this case, Substance. If, on the other hand, we had begun asking that same question of Socrates’ color, say his whiteness, we would eventually have ended at the highest kind quality. When carried out completely, Ackrill claims, this procedure will yield the ten distinct and irreducible kinds that are Aristotle’s categories. According to the second method of questioning, we are to ask as many different questions as we can about a single primary substance. So, for instance, we might ask — how tall is Socrates? Where is Socrates? What is Socrates? And in answering these questions, we will respond five feet, in the Agora, Human. We will then realize that our answers to our various questions group into ten irreducible kinds.