Aristotle's Organon: Categories & On Interpretation – Lecture 23 (History of Philosophy)

In Aristotle's four-way square (in/not-in × predicated/not-predicated), which cell holds the primary substances?

1. A.In and predicated of a subject
2. B.Predicated of a subject but not in any subject
3. C.In a subject but not predicated of any subject
4. D.Neither in any subject nor predicated of any subject