This chapter examines the suggestion that the a priori enabling conditions for epistemic perceiving include not just narrowly perceptual capacities, but also the capacity to think in certain ways; specifically, they include the capacity to think categorially. This is the point referred to in previous chapters as the Categorial Thinking Requirement (CTR). Categorial thinking is thinking by means of categorial concepts, and what CTR implies is that coming to know that a proposition about the external world is true by perceiving that it is true depends on one's possession of certain specific categorial concepts.
Keywords: object perception, Categorical Thinking Requirement, epistemic perception, foundations, minimalism