 The most extensive discussion of the notion of nonconceptual content has been in the philosophy of perception. Many have suggested that a correct specification of the representational contents of perception need not be limited to concepts possessed by the perceiver. In other words, a specification of the content of perception can be sensitive to how an organism perceptually represents its environment even though it utilizes concepts the organism need not possess. This claim is supported by a variety of different considerations, some of which concern the distinctive features of the phenomenology of perception and some which concern perception’s distinctive epistemic role. (See section  4.1  for the debate about the nonconceptual content of perception.)