As Ueberweg points out, his theory is rather a result of the transference of the Aristotelian conception of substance to the Platonic Idea, and of an identification of the relation of accidents to the substance in which they inhere with that of the individuals to the Idea of which, in the Platonic doctrine, they are copies (Hist.
A distinction (chap. 2) is drawn between things which are predicates of a subject (Kae' U?oKEi b tevov) and things which inhere in a subject (iv U7roKEL ivC J); and, while universals are called predicates of a subject, things in a subordinate category, i.e.
Attributes such as colour (xpcoaa) in the qualitative, are said to inhere in a subject.
It is true that the work gives only a negative definition of the inherent, namely, that it does not inhere as a part and cannot exist apart from that in which it inheres (1 a 24-25), and it admits that what is inherent may sometimes also be a predicate (chap. 5, 2 a 27-34).
(2) Positive assertion of the doctrine that things are individual substances in the Categories, but with the admission that attributes sometimes inhere in substance without being predicates of it, and that universal species and genera are " secondary substances."