Two further likenesses between Leibniz's monads and Thomistic angels: (1) in both, substantial form serves as the individuator
of the entity.
Accordingly, anything that has this individuator
will be identical with the object and anything which lacks it will be distinct from it.
49) There are three different varieties of the realist position generated by alternative positions on (1) the individuator
of a quality instance and (2) the spatiality of the predication relation and the quality that is instanced.