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Accueil du site > Archives > Journées et colloques 1996–2012 > Journées d’étude et colloques 2011-2012 > Ancient and Arabic Logic

Ancient and Arabic Logic

Jeudi 29 mars 2012, 10h – 16h, salle Malevitch (483A), Université Paris Diderot *

Journée dans le cadre du séminaire “Sciences et Savoirs de l’Antiquité à l’Age classique

Responsable : Ahmed Hasnaoui (SPHERE–CHSPAM).



10h – 12h Prof. Per Martin-Löf
(Stockholm University, Royal Swedish Academy of Sciences)


Aristotle’s distinction between apophansis and protasis in the light of the distinction between assertion and proposition in contemporary logic.

Abstract : The distinction between apophansis and protasis seems to have been lost already in the Alexandrian commentator tradition (Ammonius, Philoponus), a loss which influenced both Arabic and Medieval logic. It will be argued that what caused the loss was Aristotle’s own definition of the logos apophantikos, that is, the declarative sentence, as one "in which truth or falsity inheres".



14h – 16h Prof. Wilfrid Hodges
(Emeritus Professor Queen Mary, University of London, British Academy)


The grammar of meanings underlying Ibn Sina’s logic
Abstract : Ibn Sina, almost certainly following a tradition going back to Porphyry, reduced the prerequisites for logic to a minimum by basing it on our intuitive understanding of meanings. He saw meanings as organised into a kind of dependency grammar, which in his logic plays a similar role to Begriffsschrift in Frege’s logic. This gave him a handle for extending logic radically, for example to sentences with complex patterns of quantifiers.



* Laboratoire SPHERE, UMR 7219,
CNRS – Université Paris Diderot (Paris 7),
Campus Paris Rive gauche (PRG), bâtiment Condorcet,
4, rue Elsa Morante or 10, rue A. Domon et L. Duquet, 75013 Paris. Plan.
Métro ligne 14, RER C : station Bibliothèque François Mitterrand