 This proposal provides an attractive way of capturing the distinctive features of the phenomenology of perception highlighted in the previous section (see  4.1  above). Peacocke’s account of nonconceptual content is analog, unit-free and possesses the appropriate fineness of grain. Nonetheless, as Cahen (2019) has recently argued, such an externalist account of nonconceptual content, though it may capture the phenomenology of perception, is in tension with internalist commitments pertaining to the rational role of perception. Another source of difficulty is that it is not so clear how such an account can be applied beyond the domain of perception. It may well be that certain subpersonal states have such nonconceptual contents—those associated with the subpersonal underpinnings of vision are obvious candidates. But the representational states implicated in tacit knowledge of syntactic theory, for example, do not fit this model.