BEING SUBSTANTIALLY IDENTICAL, BUT LOGICALLY DISTINCT IS NONSENSE.
If matter be called nonentity in this sense that it is not essence, but something else than essence, there is still room to draw up two definitions, of which one would apply to the substrate, and the other to the privation, merely to explain that it is a disposition to become something else? It would be better to acknowledge that matter, like the substrate, should be defined a disposition to become other things. If the definition of privation shows the indetermination of matter, it can at least indicate its nature. But we could not admit that matter and privation are one thing in respect to their substrate, though logically distinct; for how could there be a logical distinction into two things, if a thing be identical with matter as soon as it is indeterminate, indefinite, and lacking quality?