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Contingency-Syllogisms

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Chapter Summary

Throughout his treatment of the contingency-syllogistic, Robert Kilwardby pursues his high-level program of supplementing Aristotle's text in ways that will enhance its credibility and systematicity. On the semantic plane, Kilwardby continues to state truth-conditions for different types of modal proposition, allowing their sense to fluctuate according to their inferential context. In the pure contingency-syllogisms, Kilwardby states a Theorem specifying which metaphysical types of term can occur as subjects or predicates in contingency-propositions. The Dialectica Monacensis states that a contingency-conclusion follows from two contingency-premises in all six moods of the third Figure. Kilwardby acknowledges that there are valid syllogisms with two negative premises, and with a negative Minor, because negative contingency-propositions are equivalent to affirmatives. Kilwardby's interpretation of the contingency-moods, like that of the necessity-moods, succeeds in displaying a certain ordo and sufficientia in Aristotle's text.

Keywords: Aristotle; contingency-syllogisms; Dialectica Monacensis ; Robert Kilwardby

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