Medieval Formal Logic : Obligations, Insolubles and Consequences (The New Synthese Historical Library 49) (2000. 256 S. 240 mm)

Central topics in medieval logic are here treated in a way that is congenial to the modern reader, without compromising historical reliability. 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.