The present text book is intended as an introduction to elementary logic. Its content, structure, and manner have been determined in large measure - perhaps 'caused' is the better word- by certain desiderata about which the reader should be informed at the outset. The leading idea is that even an introductory treatment of logic may profitably be fashioned around a rigorous framework.

In a recent paper Paul Vincent Spade suggests that, although the medieval doctrine of the modes of personal supposition originally had something to do with the rest of the theory of supposition, it became, by the 14th century, an unrelated theory with no question to answer. By contrast, I argue that the theory of the modes of personal supposition was meant to provide a way of making understandable the idea that a general term in a categorical proposition can be used (...) to refer to the individual things that fall under it. Once that idea had been made acceptable, truth conditons for the various forms of categorical proposition could be given without any specific appeal to the ideas of descent and ascent in terms of which the modes had been defined. (shrink)

_William of Sherwood's Introduction to Logic _ was first published in 1966. Minnesota Archive Editions uses digital technology to make long-unavailable books once again accessible, and are published unaltered from the original University of Minnesota Press editions. The _Introduction to Logic _ by William of Sherwood, of which this is the first English translation, is the oldest surviving treatise which contains a treatment of the most distinctive and interesting medieval contributions to logic and semantics. Sherwood was a master at Oxford (...) and Paris in the thirteenth century and the author of several logical treatises. Besides presenting material of interest in its own right, this volume is useful as an introduction to the study of those aspects of medieval philosophy that are most pertinent to the interests of contemporary philosophers. Professor Kretzmann has provided biographical, bibliographical, and philosophical backgrounds on Sherwood and an analytical table of contents. (shrink)