Keckermann remarked of the sixteenth century, "never from the begin ning of the world was there a period so keen on logic, or in which more books on logic were produced and studies oflogic flourished more abun dantly than the period-in which we live. " 1 But despite the great profusion of books to which he refers, and despite the dominant position occupied by logic in the educational system of the fifteenth, sixteenth and seven teenth centuries, very little work has been done on the logic of the post medieval period. The only complete study is that of Risse, whose account, while historically exhaustive, pays little attention to the actual logical 2 doctrines discussed. Otherwise, one can tum to Vasoli for a study of humanism, to Munoz Delgado for scholastic logic in Spain, and to Gilbert and Randall for scientific method, but this still leaves vast areas untouched. In this book I cannot hope to remedy all the deficiencies of previous studies, for to survey the literature alone would take a life-time. As a result I have limited myself in various ways. In the first place, I con centrate only on those matters which are of particular interest to me, namely theories of meaning and reference, and formal logic.

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.

’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.

Early Christianity faced the problem of the human word versus Christ the Word. Could language accurately describe spiritual reality? The Mirror of Language brilliantly traces the development of one prominent theory of signs from Augustine through Anselm of Canterbury, Thomas Aquinas, and Dante. Their shared epistemology validated human language as an authentic but limited index of preexistent reality, both material and spiritual. This sign theory could thereby account for the ways men receive, know, and transmit religious knowledge, always mediated through faith. Marcia L. Colish demonstrates how the three theologians used different branches of the medieval trivium to express a common sign theory: Augustine stressed rhetoric, Anselm shifted to grammar (including grammatical proofs of God's existence), and Thomas Aquinas stressed dialectic. Dante, the one poet included in this study, used the Augustinian sign theory to develop a Christian poetics that culminates in the Divine Comedy. The author points out not only the commonality but also the sharp contrasts between these writers and shows the relation between their sign theories and the intellectual ferment of the times. When first published in 1968, The Mirror of Language was recognized as a pathfinding study. This completely revised edition incorporates the scholarship of the intervening years and reflects the refinements of the author's thought. Greater prominence is given to the role of Stoicism, and sharper attention is paid to some of the thinkers and movements surrounding the major thinkers treated. Concerns of semiotics, philosophy, and literary criticism are elucidated further. The original thesis, still controversial, is now even wider ranging and more salient to current intellectual debate.

Originally published in 1972, Medieval Logic and Metaphysics shows how formal logic can be used in the clarification of philosophical problems. An elementary exposition of Leśniewski’s Onotology, an important system of contemporary logic, is followed by studies of central philosophical themes such as Negation and Non-being, Essence and Existence, Meaning and Reference, Part and Whole. Philosophers and theologians discussed include St Anselm, St Thomas Aquinas, Abelard, Ockham, Scotus, Hume and Russell.

The specialized essays in this collection study whether non-Aristotelian traditions of ancient logic had a role for medieval logicians. Special attention is given to Stoic logic and semantics, and to Neoplatonism.