 Although Crathorn criticized Ockham, he remained a nominalist (he admits only individuals in his ontology and subscribes to the same kind of theory of predication as Ockham). Above all, he worked out some of the consequences of Ockham’s views in epistemology, the philosophy of language, and ontology, to show what problems they created. We do not know whether he knew Ockham personally, or only indirectly, through his younger disciple, Adam Wodeham. Indeed, Wodeham frequently refers to a Dominican socius, who could have been Crathorn himself or a certain John Grafton, another Oxford Dominican of this time.