This article considers the relationship between John Buridan’s natural philosophy and medicine. By examining some aspects of Buridan’s description of the human body related to sensation, nutrition, and generation—especially as they were framed in the so-called “controversy between philosophers and physicians”—this article shows that, though mostly faithful to Aristotelian doctrine, Buridan’s theoretical biology relies to a large extent on medical ideas.

Buridan's life, works, and influence -- Buridan's logic and the medieval logical tradition -- The primacy of mental language -- The various kinds of concepts and the idea of a mental language -- Natural language and the idea of a formal syntax in Buridan -- Existential import and the square of opposition -- Ontological commitment -- The properties of terms (proprietates terminorum) -- The semantics of propositions -- Logical validity in a token-based, semantically closed logic -- The possibility of scientific (...) knowledge -- Buridan's anti-skepticism -- Buridan's essentialist nominalism. (shrink)

This paper examines some of the metaphysical assumptions behind Aquinas’s denials that a human rational soul unites with matter at conception and that a human rational soul is capable of developing and arranging the organic parts of an embryo. The paper argues that Buridan does not share these assumptions and holds that a soul is capable of developing and arranging organic parts. It argues that, given hylomorphism about the nature of organisms, including human beings, Buridan’s view is philosophically superior to (...) Aquinas’s in several respects. Finally, the paper poses an apparent inconsistency between several of Buridan’s texts on this topic and attempts to show that the inconsistency is merely apparent. (shrink)

Mental language, According to ockham, Consists of mental acts or capacities for performing mental acts. Its structure is analogous to that of spoken or written language and is the structure of a logically ideal language. Hence its study is useful for philosophy. Ockham's concern about the apparent closeness of the analogy is also considered with reference to his discussion of the possibility of angelic (and hence nonphysical) language.

I. SUPPOSITION AND SIGNIFICATIONIn an insightful article on the medieval theory of supposition, Elizabeth Karger noted a remarkable development in the characterization of the material mode of supposition between William of Ockham and his contemporaries in the early fourteenth century and Paul of Venice and others at the turn of the fifteenth century.1. E. Karger, “La Supposition Materielle comme Supposition Significative: Paul de Venise, Paul de Pergula,” in A. Maierú, ed., English Logic in Italy in the 14th and 15th Centuries (...) (Naples, 1982), pp. 331–41. For William, material supposition is explicitly ‘non-significative’, while for Paul, every mode of supposition is a kind of signification.2. Paul of Venice, Logica Magna (Tractatus de Suppositionibus), ed. and trans. A. Perreiah (St. Bonaventure, 1971), p. 4: “nam omnis suppositio est significatio.” In particular, we can set these definitions in opposition. (shrink)

John Buridan was a fourteenth-century philosopher who enjoyed an enormous reputation for about two hundred years, was then totally neglected, and is now being 'rediscovered' through his relevance to contemporary work in philosophical logic. The final chapter of Buridan's Sophismata deals with problems about self-reference, and in particular with the semantic paradoxes. He offers his own distinctive solution to the well-known 'Liar Paradox' and introduces a number of other paradoxes that will be unfamiliar to most logicians. Buridan also moves on (...) from these problems to more general questions about the nature of propositions, the criteria of their truth and falsity and the concepts of validity and knowledge. This edition of that chapter is intended to make Buridan's ideas and arguments accessible to a wider range of readers. The volume should interest many philosophers, linguists and logicians, who are increasingly finding in medieval work striking anticipations of their own concerns. (shrink)

This chapter contains sections titled: Logic Metaphysics and physics Ethics.

Physiologia provides an accessible and comprehensive guide to late Aristotelian natural philosophy; with that context in hand, it offers new interpretations of major themes in Descartes’s natural philosophy.

For the scholastic philosopher William Ockham (c. 1285-1347), there are three kinds of heresy. The first, and most unmistakable, is an outright denial of the truths of faith. Another is so obvious that a very simple person, even if illiterate, can see how it contradicts Divine Scripture. The third kind of heresy is less clear cut. It is perceptible only after long deliberation and only to individuals who are learned, and well versed in Scripture. It is this third variety of (...) heresy that J.M.M.H. Thijssen addresses in Censure and Heresy at the University of Paris, 1200-1400. The book documents 30 cases in which university trained scholars were condemned for disseminating allegedly erroneous opinions in their teaching or writing, and focuses particularly on four academic censures that have occupied prominent positions in the historiography of medieval philosophy. Thijssen grants central importance to a number of questions so far neglected by historians regarding judicial procedures, the authorities supervising the orthodoxy of teaching, and the effects of condemnations on the careers of the accused. He also places still current questions regarding academic freedom and the nature of doctrinal authority into their medieval contexts. (shrink)

Vers la fin du XIVe siècle se fait jour une théorie du signe et de la signification qui, par une réélaboration des principaux concepts sémantiques, renouvelle toute l’analyse logique du langage.Partant de Guillaume d’Ockham, dont l’œuvre est ici décisive, cet ouvrage suit le développement d’une logique fondée sur des éléments de sémiologie, à travers différents auteurs du XIVe siècle tels que Gauthier Burley, Jean Buridan, Albert de Saxe, Marsile d’Inghen, Pierre d’Ailly...Une telle « logique du signe » prend place dans (...) toute une mutation du savoir, en ce siècle où la crise profonde du monde médiéval appelle une autre conception des rapports entre l’homme, les choses extérieures et le langage. (shrink)

This book is a collection of papers on the metaphysics and natural philosophy of John Buridan (ca. 1295-1361), one of the most innovative and influential ...

This book interprets the theory of relation of John Buridan, one of the most influential thinkers of the late Middle Ages. In so doing it examines his whole wider oeuvre in the context of the history of scholastic debate.

To many contemporary philosophers, the phrase “essentialist nominalism” may appear to be an oxymoron. After all, essentialism is the doctrine that things come in natural kinds characterized by their essential properties, on account of some common nature or essence they share. But nominalism is precisely the denial of the existence, indeed, the very possibility of such shared essences. Nevertheless, despite the intuitions of such contemporary philosophers,2 John Buridan was not only a thoroughgoing nominalist, as is well-known, but also a staunch (...) defender of a strong essentialist doctrine against certain skeptics of his time. But then the question inevitably arises: could he consistently maintain such a doctrine? (shrink)