ON THE PURITY OF THE ART OF LOGIC - THE SHORTER AND THE LONGER TREATISES

This is the first complete English translation, from the Latin, of medieval philosopher Walter Burley's handbook of logic. The work circulated in the Middle Ages in a shorter and a longer version, both translated here and fully annotated. Burley is revealed as both an innovator and a conservative who used new techniques of logical and semantical analysis to defend traditional views.