Simplicius' commentary on Aristotle's Categories is the most comprehensive philosophical critique of the work ever written, representing 600 years of criticism. In his Categories, Aristotle divides what exists in the sensible world into ten categories of Substance, Quantity, Relative, Quality and so on. Simplicius starts with a survey of previous commentators, and an introductory set of questions about Aristotle's philosophy and about the Categories in particular. The commentator, he says, needs to present Plato and Aristotle as in harmony on most things. Why are precisely ten categories named, given that Plato did with fewer distinctions? We have a survey of views on this. And where in the scheme of categories would one fit a quality that defines a substance - under substance or under quality? In his own commentary, Porphyry suggested classifying a defining quality as something distinct, a substantial quality, but others objected that this would constitute an eleventh. The most persistent question dealt with here is whether the categories classify words, concepts, or things.

The contributors to this volume cover a wide range of philosophers, from Simplicius to John Wyclif, and philosophical problems, including: the harmony of Platonism and Aristotelianism; the relationship between logic, and metaphysics; the number of categories; and realism vs. nominalism.

Philoponus' On Aristotle Categories 1-5 discusses the nature of universals, preserving the views of Philoponus' teacher Ammonius, as well as presenting a Neoplatonist interpretation of Aristotle's Categories. Philoponus treats universals as concepts in the human mind produced by abstracting a form or nature from the material individual in which it has its being. The work is important for its own philosophical discussion and for the insight it sheds on its sources. For considerable portions, On Aristotle Categories 1-5 resembles the wording of an earlier commentary which declares itself to be an anonymous record taken from the seminars of Ammonius. Unlike much of Philoponus' later writing, this commentary does not disagree with either Aristotle or Ammonius, and suggests the possibility that Philoponus either had access to this earlier record or wrote it himself. This edition explores these questions of provenance, alongside the context, meaning and implications of Philoponus' work. The English translation is accompanied by an introduction, comprehensive commentary notes, bibliography, glossary of translated terms and a subject index. The latest volume in the Ancient Commentators on Aristotle series, the edition makes this philosophical work accessible to a modern readership. Philoponus was a Christian writing in Greek in 6th century CE Alexandria, where some students of philosophy were bilingual in Syriac as well as Greek. In this Greek treatise translated from the surviving Syriac version, Philoponus discusses the logic of parts and wholes, and he illustrates the spread of the pagan and Christian philosophy of 6th century CE Greeks to other cultures, in this case to Syria. Philoponus, an expert on Aristotle's philosophy, had turned to theology and was applying his knowledge of Aristotle to disputes over the human and divine nature of Christ. Were there two natures and were they parts of a whole, as the Emperor Justinian proposed, or was there only one nature, as Philoponus claimed with the rebel minority, both human and divine? If there were two natures, were they parts like the ingredients in a chemical mixture? Philoponus attacks the idea. Such ingredients are not parts, because they each inter-penetrate the whole mixture. Moreover, he abandons his ingenious earlier attempts to support Aristotle's view of mixture by identifying ways in which such ingredients might be thought of as potentially preserved in a chemical mixture. Instead, Philoponus says that the ingredients are destroyed, unlike the human and divine in Christ. This English translation of Philoponus' treatise is the latest volume in the Ancient Commentators on Aristotle series and makes this philosophical work accessible to a modern readership. The translation in each volume is accompanied by an introduction, comprehensive commentary notes, bibliography, glossary of translated terms and a subject index.

This volume studies the origin and evolution of philosophical interest in Aristotle's Categories, and illuminates the earliest arguments for Aristotle's approach to logic as the foundation of higher education.

Generally, categories are understood to express the most general features of reality. Yet, since categories have this special status, obtaining a correct list of them is difficult. This question is addressed by examining how Thomas Aquinas establishes the list of categories through a technique of identifying diversity in how predicates are per se related to their subjects. A sophisticated critique by Duns Scotus of this position is also examined, a rejection which is fundamentally grounded in the idea that no real distinction can be made from a logical one. It is argued Aquinas's approach can be rehabilitated in that real distinctions are possible when specifically considering per se modes of predication. This discussion between Aquinas and Scotus bears fruit in a contemporary context insofar as it bears upon, strengthens, and seeks to correct E. J. Lowe's four-category ontology view regarding the identity and relation of the categories.

The series is devoted to the study of scientific and philosophical texts from the Classical and the Islamic world handed down in Arabic. Through critical text editions and monographs, it provides access to ancient scientific inquiry as it developed in a continuous tradition from Antiquity to the modern period. All editions are accompanied by translations and philological and explanatory notes.

How do we judge whether we should be willing to follow the views of experts or whether we ought to try to come to our own, independent views? This book seeks the answer in medieval philosophical thought. In this engaging study into the history of philosophy and epistemology, Peter Adamson provides an answer to a question as relevant today as it was in the medieval period: how and when should we turn to the authoritative expertise of other people in forming our own beliefs? He challenges us to reconsider our approach to this question through a constructive recovery of the intellectual and cultural traditions of the Islamic world, the Byzantine Empire, and Latin Christendom. Adamson begins by foregrounding the distinction in Islamic philosophy between taqlīd, or the uncritical acceptance of authority, and ijtihād, or judgment based on independent effort, the latter of which was particularly prized in Islamic law, theology, and philosophy during the medieval period. He then demonstrates how the Islamic tradition paves the way for the development of what he calls a “justified taqlīd,” according to which one develops the skills necessary to critically and selectively follow an authority based on their reliability. The book proceeds to reconfigure our understanding of the relation between authority and independent thought in the medieval world by illuminating how women found spaces to assert their own intellectual authority, how medieval writers evaluated the authoritative status of Plato and Aristotle, and how independent reasoning was deployed to defend one Abrahamic faith against the other. This clear and eloquently written book will interest scholars in and enthusiasts of medieval philosophy, Islamic studies, Byzantine studies, and the history of thought.