 William Crathorn (fl. 1330s), like Adam Wodeham (d. 1358) and Robert Holkot (c. 1290–1349), belonged to the first generation of Oxford philosophers after William of Ockham (c. 1285–1347), who sought to criticize and develop Ockham’s philosophy. Crathorn is remembered for his theories of language and cognition, and for some anti-skeptical arguments strikingly similar to those found in Descartes’ Meditations. The radical ontology of his works is also noteworthy, though it has not yet been closely studied.