Medieval Formal Logic: Obligations, Insolubles and Consequences

Description

Central topics in medieval logic are here treated in a way that is congenial to the modern reader, without compromising historical reliability. The achievements of medieval logic are made available to a wider philosophical public then the medievalists themselves. The three genres of logica moderna arising in a later Middle Ages are covered: obligations, insolubles and consequences - the first time these have been treated in such a unified way. The articles on obligations look at the role of logical consistence in medieval disputation techniques. Those on insolubles concentrate on medieval solutions to the Liar Paradox. There is also a systematic account of how medieval authors described the logical content of an inference, and how they thought that the validity of an inference could be guaranteed. Front Matter....Pages i-xii Front Matter....Pages 1-1 Duties, Rules and Interpretations in Obligational Disputations....Pages 3-34 Disputation and Change of Belief Burley’s Theory of Obligationes as a Theory of Belief Revision....Pages 35-62 Obligations and Liars....Pages 63-94 The Relations between Insolubles and Obligations in Medieval Disputations....Pages 95-114 Front Matter....Pages 115-115 Consequence as Inference: Mediaeval Proof Theory 1300–1350....Pages 117-145 Consequence and Rules of Consequence in the Post-Ockham Period....Pages 147-181 Self-Reference and Validity Revisited....Pages 183-196 Front Matter....Pages 197-197 The Emmeran Treatise on False Positio ....Pages 199-215 The Emmeran Treatise on Impossible Positio ....Pages 217-223 Questions on Aristotle’s Prior Analytics ....Pages 225-234 Back Matter....Pages 235-241