The Questiones libri Porphirii is a commentary on Porphyry's Isagoge by the fourteenth-century logician Thomas Manlevelt. It is edited here in full. Not much is known of Thomas Manlevelt, but his work is remarkable enough. Following in the footsteps of William of Ockham, Manlevelt stresses the individual nature of all things existing in the outside world. He radically challenges our conceptional framework. He applies Ockham's razor in a ruthless manner to do away with all entities not deemed necessary for preservation. In the end, Manlevelt even maintains that substance does not exist. In this text early Ockhamism is being pushed to its extremes.

The Questiones libri Porphirii is a commentary on Porphyry's Isagoge by the fourteenth-century logician Thomas Manlevelt. In this text early Ockhamism is being pushed to its extremes. It is edited here in full.

This volume, the first dedicated and comprehensive companion to medieval logic, covers both the Latin and the Arabic traditions, and shows that they were in fact sister traditions, which both arose against the background of a Hellenistic heritage and which influenced one another over the centuries. A series of chapters by both established and younger scholars covers the whole period including early and late developments, and offers new insights into this extremely rich period in the history of logic. The volume is divided into two parts, 'Periods and Traditions' and 'Themes', allowing readers to engage with the subject from both historical and more systematic perspectives. It will be a must-read for students and scholars of medieval philosophy, the history of logic, and the history of ideas.

Three basic forces dominated sixteenth-century religious life. Two polarized groups, Protestant and Catholic reformers, were shaped by theological debates, over the nature of the church, salvation, prayer, and other issues. These debates articulated critical, group-defining oppositions. Bystanders to the Catholic-Protestant competition were a third force. Their reactions to reformers were violent, opportunistic, hesitant, ambiguous, or serendipitous, much the way social historians have described common people in the Reformation for the last fifty years. But in an ecology of three forces, hesitations and compromises were natural, not just among ordinary people, but also, if more subtly, among reformers and theologians. In this volume, Christopher Ocker offers a constructive and nuanced alternative to the received understanding of the Reformation. Combining the methods of intellectual, cultural, and social history, his book demonstrates how the Reformation became a hybrid movement produced by a binary of Catholic and Protestant self-definitions, by bystanders to religious debate, and by the hesitations and compromises made by all three groups during the religious controversy.

This book sets out a thematic presentation of human action, especially as it relates to morality, in the three most significant figures in Medieval Scholastic thought: Thomas Aquinas, John Duns Scotus, and William of Ockham

This volume honours Sten Ebbesen with a series of essays on logical and linguistic analysis in the Middle Ages. Included are studies focusing on textual criticism, new finds of logical texts, and philosophical analysis and interpretation.