This is the final part of the translation in this series of Ammonius' commentary on Aristotle "On Interpretation." This is the only commentary written out and published by Ammonius, teacher of the philosophers Philoponus, Simplicius, Asclepius and Olympiodorus. Ammonius based his commentary on the lectures of Proclus, which he supplemented with material from the copious commentary of Porphyry, which was also a main source of Boethius' commentary, and the commentary of Proclus' teacher Syrianus. A major contribution of Ammonius' own was his demonstration that "On Interpretation" was a...

Aristotle's On Interpretation, the centrepiece of his logic, examines the relationship between conflicting pairs of statements. The first eight chapters, analysed in this volume, explain what statements are, starting from their basic components - the words - and working up to the character of opposed affirmations and negations.
Ammonius, who in his capacity as Professor at Alexandria from around AD 470 taught almost all the great sixth-century commentators, left just this one commentary in his own name, although his lectures on other works of Aristotle have been written up by...