 Ockham rejected this entire theory of species. For him, species are unnecessary to a successful theory of cognition, and he dispenses with  them.[42]  Moreover, he argues, the species theory is not supported by experience; introspection reveals no such species in our cognitive  processes.[43]  This rejection of the species theory of cognition, which had been foreshadowed by several previous authors (such as Henry of Ghent in the thirteenth century), was an important development in late medieval  epistemology.[44]