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Proofs of Propositions in 14th-Century Logic



  Time: 23 May, 2017 - 24 May, 2017
  Location: Hebdomadar's Room, St Salvator's Quad, St Andrews
Paul Spade famously complained in 2000 that four key components of late medieval logic were mysterious to modern scholars. Since then, much has been done to clarify two of them (obligations and supposition), but the other two (exposition and proofs of propositions) remain just as mysterious. The aim of this workshop is to reach a clearer understanding of the genre of 'proofs of propositions' (probationes propositionum) that came to characterize British logic in the second half of the 14th century. The workshop will also consider the earlier theories of 'exposition' that were subsumed into this new genre.


Registration is free of charge, and includes tea and coffee between the talks but not meals. To register, please email either Mark Thakkar ( or Stephen Read.

Tuesday 23 May

10:00 Mark Thakkar (St Andrews) 'Wyclifs Probationes propositionum'
11:00 Tea/Coffee
11:30 Graziana Ciola (Pisa) 'Expositiones and Consequentiae in Marsilius of Inghen'
12:30 Lunch
14:00 Harald Berger (Graz) 'Helmoldus Zoltwedel and his Quaestiones Byligam, Prague 1396'
15:00 Tea/Coffee
15:30 Martin Dekarli (Vienna) 'Stephen of Paleczs Notabilia on Billingham' [title TBC]
16:30 Tea/Coffee
17:00 Ota Pavlcek (Czech Academy of Sciences) 'Jerome of Pragues (?) Probationes propositionum' [title TBC]
18:00 Finish
19:30 Dinner

Wednesday 24 May

10:00 Egbert Bos (Leiden) 'Henry of Coesfeld (?) as a Commentator on Billinghams On the Tests of Terms, and the Expository Syllogism'
11:00 Tea/Coffee
11:30 Joke Spruyt (Maastricht) 'Henry of Coesfeld (?) on Gradation and Change'
12:30 Lunch
14:00 Riccardo Strobino (Tufts) 'Probatio in Peter of Mantuas Logic'
15:00 Tea/Coffee
15:30 Jenny Ashworth (Waterloo) 'The Reception of Probationes in the Late 14th, 15th and Early 16th Centuries'
16:30 Finish
19:30 Dinner

Financial Support

We gratefully acknowledge financial support from the University of St Andrews, the Leverhulme Trust , the Scots Philosophical Association and the British Logic Colloquium.

Leverhulme Trust
Scots Philosophical Association