Connexive Logic in the Middle Ages
By (author) Wolfgang Lenzen
Hardback (Published)
(May 2026)
ISBN: 9783957433572
6.1 x 9.25 inches
Price: $113.00
On back order
Connexive logic is a rather new branch of modern logic, based on the idea that no proposition ever implies its own negation. This idea goes back to Aristotle, who put forward the thesis that one and the same consequent cannot be “necessitated” by the same antecedent affirmed and denied. Many medieval logicians discovered, however, that the connexive theses fail to hold in certain cases, namely when the antecedent is impossible, or when the consequent is necessary.
This book scrutinizes the theories of various medieval logicians such as Boethius, Abelard, Kilwardby, Burley, Buridan, Paul of Venice, Albert of Saxony, and the Pseudo-Scot, who endorsed a conception of conditionals as strict implications. This conception validates the “humble” version of the connexive principles, but invalidates their “hardcore” versions according to which, e.g., even the tautological disjunction ‘p or not-p’ is not implied by its own negation, i.e., by the self-contradictory conjunction ‘p and not-p’.
Wolfgang Lenzen was born in 1946 in Essen. In 1981 he became full professor of philosophy at the University of Osnabrück, where he stayed until his retirement in 2011. He has published 15 books and around 150 articles in various fields of philosophy. His current research is focussed on the history of logic, espcially medieval logic.
- By (author) Wolfgang Lenzen
Similar Books
Drunk the Potion, No Whit Charmed
The Doctrine of Pure and Perfect Souls from Iamblichus to Damascius
Éthique, politique, religions
Superstition (XVIIe - XXIe siècles). Sémantique, histoires et cultures
La Lettre clandestine
La littérature philosophique clandestine, ses éditeurs et ses éditions
Volume 34
Libertinage et philosophie à l’époque classique (XVIe-XVIIIe siècle)
Athéisme, Modernité et Sécularisation / Atheism, Modernity and Secularization
Volume 23
Political Thought and Eleventh-Century Populism
The Meek, the Many, and the Meritorious during the Age of the Gregorian Reform
Volume 38
The Latin Hermes in Translation
Asclepius, Glosses on Trismegistus, Book of Six Principles of Things, Book of 24 Philosophers
Volume 50
![Book cover: Transitive Media [Philosophy]](https://isd.stisonbooks.com/images/books/native/9781804132326.jpg?asset_id=66970)
‘Emergente Evolution’?
Fallstudien zur philosophischen Rekonstruktion und schopfungstheologischen Rezeption eines naturalistischen Paradigmas
Volume 40
Al-Ğābirīs Genese und Kritik der Arabischen Vernunft
On Genesis and Critique of Arab Reason by Muḥammed ʿĀbid al-Ğābirī
Geschichte der Ästhetik und Kunsttheorie
Band 1: Von der Antike bis zum 19. Jahrhundert. 2. aktualisierte Auflage
