Abstract

According to Nicole Oresme (c. 1320–1382), human beings, unlike all other animals, consist of two substances: a thinking substance and a sensing substance. This paper presents and explores the arguments Oresme uses to arrive at this position, which is unusual in medieval philosophical psychology and which at least superficially – though their methods are completely different – resembles what Descartes concluded about the nature of the human soul and body two and a half centuries later. The paper also considers some moments of ambivalence in Oresme’s presentation, as well as unresolved difficulties, several of which have theological as well as philosophical implications.