 Perhaps the most interesting non-qualitative approach is the theory, often associated with Aquinas (but attacked by Scotus in the forms presented by Godfrey of Fontaines and Giles of Rome), that individuation is by extended matter: by, as we might say, chunks of matter. Scotus’s way of understanding the problem of individuation becomes important in his rejection of this theory. For his fundamental strategy against this sort of material individuation is that such a theory, while it may be able to explain numerical distinction, certainly cannot explain indivisibility: