Abstract
According to St. Thomas, the natures of material things are the proper objects of human understanding. 1 And he holds that, at least in this life, humans cognize these natures, not through innate species or by perceiving the divine exemplars, but only by abstraction from phantasms (ST Ia, 84.7, 85.1). 2 More precisely, the human intellects potency to understand. 3 The aim of the present piece is to clarify Thomass antinativism—arguably the most important historical and philosophical legacy of his cognitive psychology