Abstract
In two respects this edition of Kilvington's Sophismata is a major event in the study of medieval philosophy. First, this important work throws light on the special logico-analytic character of the intellectual enterprise of Oxford Calculatores, who are justifiably credited with advancing natural philosophy and mathematics. Secondly, it contributes to the recent efforts to trace the development of medieval formal disputation, the obligatio, from the "old response" represented by Sherwood, Burley, and Ockham, to the "new response" espoused by Richard Swyneshed, Lavenham, Fland, and others.