Imaginable Impossibilities and Thought Experiments

Conference announcement: “Logic and Modalities in the Late Middle Ages”, 17-19 October 2022, Parma

Dear colleagues,

We are happy to announce the international conference "Logic and Modalities in the Late Middle Ages", which will be held at the University of Parma, from 17 to 19 October 2022. The event is part of the Marie Skłodowska Curie "Calculatores" and involves the Universities of Parma and Toronto. It will be held in presence at Via D'Azeglio 85 (classroom C) and online on Zoom platform. 
For information and Zoom link, write to:

The poster is available at the following link:  

Conference programme follows:
Monday, October 17th

09.45 Welcome

10.00 PETER KING (University of Toronto):  “The Enterprise of Medieval Logic”

10.45 SILVIA DI VINCENZO (IMT Lucca): “Like another God, or like the Phoenix: The role of modalities in the classification of universals in late medieval post-Avicennian Arabic logic (13th-14th century CE)”

11.30 Coffee Break

12.15 JULIE BRUMBERG (CNRS): “A newly-identified sophisma ‘Omnis homo de necessitate est animal’ (OHNEA) and Robert Kilwardby’s ‘approriation rule’ as a solution to the problem of the ‘two Barbaras’: consequences from universal to singular propositions in medieval logic”

13.00-14.30 lunch break

14.30 SUF AMICHAY (Cambridge University): “The Modal Argument ‘if God possibly is, God Necessarily is’ in 14th Century Europe”

15.15 Break

15.45 GUIDO ALT (Stockholm University): “Eternality and Modal Necessity”


Tuesday, October 18th

09.30 STEPHEN READ (University of St. Andrews)“Consequence and Signification in Fourteenth-Century Logic”

10.15 BOAZ SCHUMAN (University of Copenhagen): “Necessary Inferences As-of-Now (ut nunc)”

11.00 Coffee Break

11.45 ALESSANDRO CONTI (Università dell’Aquila): Bradwardine and the problem of future contingents

12.30 Lunch

14.00 DAVIDE FALESSI (Universität Luzern): “Ockham and Buridan’s reduction of accidental being and per se being to modal propositions”

14.45 CESAR REIGOSA (University of Gröningen): “Truth, Meaning and Future Contingents”

15.30 Coffee Break

16.15 BARBARA BARTOCCI and LAURENT CESALLI (University of Geneva):   “An introduction to Richard Brinkley’s view on signification, truth and paradoxes


 Wednesday, October 19th


10.00 CHRISTOPHER J. MARTIN (University of Auckland): “Impossible Positio and the Foundations of Metaphysics”

10.45 MONIKA MICHAŁOWSKA (Medical University of Łódź): “At the Intersections of Ethics and Logic: Richard Kilvington on the Will”

11.30 Coffee Break

12.15 SYLVAIN ROUDAUT (University of Stockholm): “Studying nature through thought experiments: William Heytesbury and Richard Swineshead on types of impossibilities and valid inferences”

13.00 Lunch

14.30 GRAZIANA CIOLA (Radboud University Nijmegen): “Hic et Nunc: Points, Instants and the Usefulness of Impossible Tools in “Nominalist” Logic After Buridan”

15.15 Break

15.45 MASSIMO MUGNAI (Scuola Normale Superiore): Gerolamo Saccheri on consequence and modalities

16.30 End of works

Leave a Reply