فاعلم أن الثلاثة الأول يقال لها: الذاتيات، ويقال للآخرين: العرضيات.
Know that the first three are called intrinsic predicables, and the remaining two extrinsic predicables.
Intrinsic: genus, species and differentia, all associated with an essential account (with a technical qualification about species).
Extrinsic: property and common accident, neither of which constitutes the species' essence. This distinction later underlies essential definitions and descriptions.