Walter Burley was one of the most prominent logicians and metaphysicians of the Middle Ages. This volume, which contain thirteen substantial articles on his philosophy, is aimed to reconstruct the internal evolution of his doctrines and the role they played in the development of Late Medieval philosophy.

Apart from the opposite semantic attitudes, the main difference between Late Medieval Realists and Nominalists lies in the antithetic evalutation of the nature and ontological status of essences. In the article a very interesting exemple of the medieval realist approach to the problem of essence, that of Walter Burley, is discussed. Because of Ockham's criticisms of the traditional realist conceptions, Burley's ontological convictions evolved over the years from a quite original version of the moderate realism inspired by Averroe's doctrine on (...) essence, to the radical (and somehow Platonic) form of realism proper to his final theories. (shrink)

The German Johannes Sharpe is the most important and original author of the so called "Oxford Realists": his semantic and metaphysical theories are the end product of the two main medieval philosophical traditions, realism and nominalism, for he contributed to the new form of realism inaugurated by Wyclif, but was receptive to many nominalist criticisms. Starting from the main thesis of Wyclif's metaphysics, that the universal and individual are really identical but formally distinct, Oxford Realists introduced a new type of (...) predication, based on a partial identity between the entities for which the subject and predicate stood, called predication by essence, and then redefined the traditional post-Aristotelian categories of essential and accidental predication in terms of this partial identity. Sharpe substantially shares the metaphysical view and principles of the other Oxford Realists, but he elaborates a completely different semantics, since he accepts the nominalist principle of the autonomy of thought in relation to the world, and Ockham's explanation for the universality of concepts. Unfortunately, this semantic approach partially undermines his defence of realism, since it deprives Sharpe of any compelling semantic and epistemological reasons to posit universalia in re. Therefore, Sharpe's main ontological theses certainly are sensible and reasonable, but, paradoxically, within his philosophical system they cannot in any way be considered as absolutely consistent. (shrink)

The relationship between thought and reality was a focal point of Wyclif’s reflection. On the one hand, Wyclif believed that thought was linguistically constrained by its own nature; on the other hand, he considered thought to be related to reality in its elements and constitution. Hence he deemed language, thought, and external reality to be of the same logical coherence. Within this context, the theory of supposition was intended to explain the different roles that terms can have in relation to (...) language and the extra-mental world when they appear as extremes in propositions. Characteristically, his theory of supposition provides an account not only of the truth-values of a sentence, but also of its meaning; it is not therefore simply a theory of reference, but a sort of complex analysis of language viewed as a semiotic system whose unique interpretative model was reality itself. It gives clear evidence of Wyclif’s realist stance and of his conviction that any kind of linguistic and semantic features must be grounded on ontological structures. (shrink)