Divisibility into subjective parts, of course, is on the face of it very different from the question of division from all other things, so nicely exemplified in Black’s example of the qualitatively identical spheres. Scotus’s assumption, however, is that both questions can be answered in the same way. Thus Scotus supposes that the explanation for distinction is the explanation for indivisibility, and the rough outline of what he is thinking looks as follows. The explanation for distinction is pr