Medieval logicians advanced far beyond the logic of Aristotle, and this book attempts to demonstrate the magnitude of their achievement. Walter Burley, William Ockham, John Buridan, Albert of Saxony, and Paul of Venice are among the great figures examined.

Introduction ; 1. Aspects of Language ; 2. Categorical Propositions ; 3. Molecular Propositions ; 4. Valid Inference ; 5. Validity Conditions and Unanalysed Propositions ; 6. Validity Conditions and Analysed Propositions ; 7. Syllogistic Tense Logic ; Conclusion

From reviews of the first edition: `a very good introduction to the theories of inference in medieval logic' J. A. Trentman, Canadian Philosophical Review `Informed, intelligent and clearly written ... The selection of topics is judicious, and the presentation well organized .. In short, if you have been wondering what medieval logic is all about, this is an excellent book to begin with.' Peter King, Philosophical Review `an excellent introduction to, and handbook of, medieval logic ... fills a need met by nothing else written to date ... for many it might make medieval logic interesting for the first time as a source of genuine logical insight.' John Longeway, International Studies in Philosophy `The scholarly approach has been rendered adequate by the provision of a modest number of footnotes, by the citation of modern editions of medieval texts, and by the addition of recent secondary sources to the bibliography ... I have no hesitation in recommending the second edition to the general reader.' The Philosophical Review