Hans-Johann Glock develops a capacity-based alternative to the currently widespread view that concepts and experiences are mental representations. He claims that experiences must be explained by way of perceptual and sensory capacities and that concepts must be explained by way of intellectual ones, in particular, by way of capacities for classification and reasoning. Glock does not, however, identify concepts with intellectual capacities. He rather conceives of them as rules that guide the application of capacities. He defines the relationship between perceptions and concepts by coupling rationalistic, Aristotelian, and Kantian motifs: perceptions are to be strictly distinguished from concepts; perceptual capacities genetically, causally, and conceptually precede conceptual ones; and conceptual capacities must, in principle, be applicable to objects of experience. Glock's “capacity approach” can accordingly be understood as a variant of non-conceptualism.