Abelard's Treatment of Logical Determinism in Its Twelfth-Century Context

This article investigates Abelard's defence of the compatibility between universal bivalence and the existence of future contingent events. It first considers the standard strategy put forward by twelfth-century commentators to solve Aristotle's dilemma in De Interpretatione 9, which fundamentally relies on Boethius' distinction between definite and indefinite truth values. Abelard's own position on the dilemma is then introduced, focusing on a specific deterministic argument considered in his logical works that aims to demonstrate that, given the determinacy of present-tense propositions such as '"that Socrates will eat tomorrow" is true', future contingent events such as that Socrates will eat tomorrow are determinate in advance. In addition to presenting Abelard's reply to the argument, the article offers an analysis of his notions of contingency, determinacy, and future events, and a comparison between Abelard's position and other twelfth-century discussions on future contingents.