Margaret Cameron, Ph.D. (2005) in Philosophy, University of Toronto, is Research Council Chair and Assistant Professor of Philosophy at the University of Victoria.John Marenbon, Ph.D (1979), Trinity College, University of Cambridge, is a Senior Research Fellow of Trinity College, Cambridge and Honorary Professor of Medieval Philosophy in the University of Cambridge.

• List of Contributors .. viiPreface .. xiMethods and Methodologies: An Introduction .. 1Margaret CameronPART ONE: METHODSThe ‘Ontologization’ of Logic. Metaphysical Themes in Avicenna’s Reworking of the Organon .. 27Amos BertolacciAverroes and the Logical Status of Metaphysics .. 53Matteo di GiovanniNon Est Natura Sine Persona. The Issue of Uninstantiated Universals from Late Antiquity to the Early Middle Ages .. 75Christophe ErismannWhat Counted as Logic in the Thirteenth Century? .. 93Sten EbbesenTwo Summulae, Two Ways of Doing Logic: Peter of Spain’s ‘Realism’ and John Buridan’s ‘Nominalism’ .. 109Gyula KlimaThe Scope of Logic: Soto and Fonseca on Dialectic and Informal Arguments .. 127E. Jennifer AshworthPART TWO: METHODOLOGIESInterpreting Medieval Logic and in Medieval Logic .. 149Simo KnuuttilaIs There a Medieval Mereology? .. 161Andrew ArligOn Formalizing the Logics of the Past .. 191Paul ThomDe Interpretatione 5–8: Aristotle, Boethius, and Abaelard on Propositionality .. 207Christopher J. MartinBibliography .. 229Index .. 241