01/08/2014

Workshop on Modal Syllogistic


11-13 September 2014, University of Lisbon
Aristotle is the founder of modal logic. His system of modal syllogisms, presented in chapters 3 and 8-22 of the first book of the Prior Analytics, has been studied for many centuries, with less than successful results. In 1955, Jan Łukasiewicz declared that “in contrast to the assertoric syllogistic which is perfectly clear and nearly free of errors, Aristotle’s modal syllogistic is almost incomprehensible because of its many faults and inconsistencies”. Some scholars have been trying to resist this pessimistic judgement and to articulate interpretations of the modal syllogistic that are, at the same time, logically consistent and plausible on exegetical grounds. This workshop wants to provide a forum for discussion and to reflect, via the contributed talks and informal discussions, the state of art of the subject.

PROGRAMME:

Thursday, 11 September
Venue: Faculty of Letters, Room Mattos Romão
9:30-11:00 Edi Pavlovic (Budapest), “On a Fundamental Mismatch between Aristotle’s Modal Syllogistic and Modern Modal Logic”
11:00-11:30 Coffee Break
11:30-13:00 Ulrich Nortmann (Saarland), “Aristotle on the Opposition and the Conversion of Modally Qualified Propositions: Some Implications for a Kripke-style Analysis of the Darker Part of the Syllogistics”
13:00-14:30 Lunch
14:30-16:00 Leon Geerdink (Groningen), “A Dialogue Semantics for the Apodeictic Syllogistic”
16:00-16:30 Coffee Break
16:30-18:00 Marko Malink (Chicago), “What, if any, is the Use of Aristotle’s Modal Syllogistic?”

Friday, 12 September
Venue: Faculty of Letters, Room Mattos Romão
9:30-11:00 Lucas Angioni (Campinas), “Perfection and Imperfection of Modal Syllogisms with Mixed Premises”
11:00-11:30 Coffee Break
11:30-13:00 Adriane Rini (Massey), “How Would the Modal Syllogistic Look if Becker Were Right?”
13:00-14:30 Lunch
14:30-16:00 Luca Gili (Leuven), “Alexander of Aphrodisias on Mixed Modal Syllogistic”
16:00-16:30 Coffee Break
16:30-18:00 Sara Uckelman (Heidelberg), “Irregular Modal Syllogisms in Paul of Venice”

Saturday, 13 September
Venue: Hotel Sana Executive, Room Gulbenkian
9:00-10:30 Felipe Weinmann (Campinas), “Are Aristotle’s Modalities Ambiguous?”
10:30-11:00 Coffee Break
11:00-12:30 Paolo Crivelli (Geneva), “Aristotle’s Definitions of Possibility in the Prior Analytics”

Abstracts of the papers are already available at

Participation is free, but please register by sending an email to Domingos Faria at
Please include your status and institutional affiliation when registering.

Organizer: Ricardo Santos (Évora and Lancog, Lisbon)


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5 Domingos Faria: Workshop on Modal Syllogistic 11-13 September 2014, University of Lisbon Aristotle is the founder of modal logic. His system ...
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