 Alfarabi’s books on the Aristotelian Categories, De interpretatione, and the First Analytics, were also interpreted by Avempace. Alfarabi had “completed” the latter with a Book of the Analysis and Avempace made an “exercitation” on it, Al-Irtiyad fi kitab at-Tahlil. His annotation on the First Analytics contains his views on Aristotle’s purpose in introducing the syllogism: