 However, Christopher Peacocke offers an argument against the autonomy thesis; concluding that “… nonconceptual content is not a level whose nature is completely explicable without reference to conceptual contents … At the most basic level, conceptual and nonconceptual content must be elucidated simultaneously” (Peacocke 1992, pp. 90–91). His argument is based on a neo-Kantian understanding of the relation between experience of an objective world and self-consciousness. In essence he suggests that no creature can properly be attributed states with genuine spatial contents unless it grasps the distal environment in a minimally objective way. A condition on grasping the distal environment in this way is that the organism is capable of utilizing such states in forming and updating an integrated representation of the layout of its environment and is thus able to reidentify particular locations within it. The requirement of concept possession comes in because these capacities essentially involve an ability to represent both the spatial configuration of the environment and one’s own changing position within that environment—and, he suggests, this would be impossible for a creature lacking a rudimentary concept of the first-person.