Other things, again, are both predicable of a subject and present in a subject. Thus while knowledge is present in the human mind, it is predicable of grammar.
There is, lastly, a class of things which are neither present in a subject nor predicable of a subject, such as the individual man or the individual horse. But, to speak more generally, that which is individual and has the character of a unit is never predicable of a subject. Yet in some cases there is nothing to prevent such being present in a subject. Thus a certain point of grammatical knowledge is present in a subject.
Above is a part of section 1 part 2 of Aristotle’s The Categories. In the line “Thus while knowledge is present in the human mind, it is predicable of grammar.”, did Aristotle mean it this way: the human mind is knowledge, the human mind is knowledgeable?