Abstract

The paper focuses on the concepts of truth, truth-making and truth-preservation and their role in defining deductive validity as analysed by the late-medieval nominalist scholar Martin Le Maistre (1432–1481) in his Tractatus consequentiarum. This treatise, examined from the point of view of fourteenth-century British and Parisian influences, can be characterised as a critical adoption of the previous logical tradition and as the analysis of validity in term of truth-preservation. Part of this analysis is a study of self-referential phenomena, in particular, of self-referential inferences which are addressed in terms of a Bradwardinian implicit-meaning analysis of self-reference by Le Maistre. Also, his analysis of “consequentia formalis” summarises the fourteenth-century development of the discussion and compares alternative approaches towards formality.

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