’This sentence is false’ - is that true? The ’Liar paradox’ embodied in those words exerted a particular fascination on the logicians of the Western later Middle Ages, and, along with similar ’insoluble’ problems, forms the subject of the first group of articles in this volume. In the following parts Professor Spade turns to medieval semantic theory, views on the relationship between language and thought, and to a study of one particular genre of disputation, that known as ’obligationes’. The focus is on the Oxford scholastics of the first half of the 14th century, and it is the name of William of Ockham which dominates these pages - a thinker with whom Professor Spade finds himself in considerable philosophical sympathy, and whose work on logic and semantic theory has a depth and richness that have not always been sufficiently appreciated.

'This sentence is false' - is that true? The 'Liar paradox' embodied in those words exerted a particular fascination on the logicians of the Western later Middle Ages, and, along with similar 'insoluble' problems, forms the subject of the first group of articles in this volume. In the following parts Professor Spade turns to medieval semantic theory, views on the relationship between language and thought, and to a study of one particular genre of disputation, that known as 'obligationes'. The focus is on the Oxford scholastics of the first half of the 14th century, and it is the name of William of Ockham which dominates these pages - a thinker with whom Professor Spade finds himself in considerable philosophical sympathy, and whose work on logic and semantic theory has a depth and richness that have not always been sufficiently appreciated.

In 1962–1967 Professor L.M. de Rijk published his Logica Modernorum – A Contribution to the History of Early Terminist Logic. The first part (1962) has the title: On the Twelfth Century Theories of Fallacy. The second part (two volumes, 1967) has as title: The Origin and the Early Development of the Theory of Supposition. De Rijk’s Logica Modernorum provides the basis for the modern study of medieval theories of supposition. Now, nearly 50 years later, scholars have made great progress in the study of the properties of terms. De Rijk’s study was primarily about the early development of terminist logic, i.e. during the 12th and 13th centuries. Scholars have also investigated later developments well into the sixteenth and seventeenth centuries. Not only logical texts, but also texts on grammar have been published. Many of the scholars who have contributed to this development, present papers in this volume. Contributors are Fabrizio Amerini, Jenny Ashworth, Allan Bäck, Bert Bos, Julie Brumberg-Chaumont, Laurent Cesalli, Lambert Marie de Rijk, Sten Ebbesen, Alessandro Conti, Catarina Dutilh-Novaes, Onno Kneepkens, Costantino Marmo, Dafne Mure, Claude Panaccio, Ernesto Perini Santos, Joel Lonfat, Angel d’Ors, Göran Sundholm and Luisa Valente.

The Cambridge Companion to Medieval Philosophy, first published in 2003, takes its readers into one of the most exciting periods in the history of philosophy. It spans a millennium of thought extending from Augustine to Thomas Aquinas and beyond. It includes not only the thinkers of the Latin West but also the profound contributions of Islamic and Jewish thinkers such as Avicenna and Maimonides. Leading specialists examine what it was like to do philosophy in the cultures and institutions of the Middle Ages and engage all the areas in which medieval philosophy flourished, including language and logic, the study of God and being, natural philosophy, human nature, morality, and politics. The discussion is supplemented with chronological charts, biographies of the major thinkers, and a guide to the transmission and translation of medieval texts. The volume will be invaluable for all who are interested in the philosophical thought of this period.

William of Ockham (c.1287-1347) is known to be one of the major figures of the late Middle Ages. The scope and significance of his doctrine of human thought, however, has been a controversial issue among scholars in the last decade, and this book presents a full discussion of recent developments. Claude Panaccio proposes a richly documented and entirely original reinterpretation of Ockham's theory of concepts as a coherent blend of representationalism, conceptual atomism, and non reductionist nominalism, stressing in the process its special interest for current discussions in philosophy of mind and cognitive sciences.

The notion that human thought is structured like a language, with a precise syntax and semantics, has been pivotal in recent philosophy of mind. Yet it is not a new idea: it was systematically explored in the fourteenth century by William of Ockham and became central in late medieval philosophy. Mental Language examines the background of Ockham's innovation by tracing the history of the mental language theme in ancient and medieval thought. Panaccio identifies two important traditions: one philosophical, stemming from Plato and Aristotle, and the other theological, rooted in the Fathers of the Christian Church. The study then focuses on the merging of the two traditions in the Middle Ages, as they gave rise to detailed discussions over the structure of human thought and its relations with signs and language. Ultimately, Panaccio stresses the originality and significance of Ockham's doctrine of the oratio mentalis (mental discourse) and the strong impression it made upon his immediate successors.

"William of Ockham is a towering figure in the history of philosophy and he is commonly seen as the most important nominalist thinker of the Middle Ages. His nominalism basically consists in three theses: there are no universals in the external world, no relations either, and no quantities considered as distinct entities. This book provides an introduction to Ockham's defence of these positions and to what they amount to in metaphysics, semantics, and epistemology. It thus displays the outlines of a rich and carefully crafted nominalist system that is still of great philosophical interest today. All along in so doing, it situates Ockham's thought with respect to several salient contemporary debates in philosophy"--