 The basic thought is that a common nature cannot be numerically singular – if it were, it would be a particular, and the distinction between the common and the particular would simply break down. But it must have some kind of unity, since it has some kind of being or reality. The result of the relevant kind of division is that in some sense the whole common nature is in each instantiation of it. But the whole common nature is not to be understood to be identically (numerically) the same in each instantiation, as Scotus makes clear elsewhere, and as in any case we might expect, given the part-whole language that Scotus uses in the passage just quoted. It seems as though there are both intensional and extensional aspects to the nature: intensionally, it is fully in each instantiation, but extensionally the nature somehow becomes many on instantiation. (Not just: comes to exist in many things, unless this be construed to mean that the nature becomes many when it comes to exist in many things.) At least from an extensional point of view, there is more to humanity than just what is found in me. Another way of thinking about the relevant relation might be to think of natures as in some sense ‘content,’ and each individual as the ‘carrier’ of this content. The nature, as far as its content is concerned, is fully in each carrier of the content, but is multiplied in its carriers (such that each carrier bears fully the same content, and so the same content becomes many in its carriers, just as the content of a book is multiplied in its several copies).