Abstract

_ Source: _Volume 56, Issue 3-4, pp 272 - 291 This paper offers an analysis of Marsilius of Inghen’s definition of _consequentia_ and of his treatment of logical validity as presented in the first book of his treatise on _Consequentiae_. Comparing Marsilius of Inghen’s, John Buridan’s, and Albert of Saxony’s theories, the author argues that Marsilius’ account is based on a conception of consequence as a relation of entailment among propositions rather than as a type of conditional sentence and, thus, moves the discussion away from the sentential level. Therefore, Marsilius’ theory represents an original and important contribution to fourteenth-century discussions on consequences.