  Hoffman (2016) argues that the extended mind thesis thus has implications for how we judge the mental health status of an agent, including whether or not they meet diagnostic criteria for particular disorders. Based on this discussion, we can draw a distinction between narrow, situated and wide theories of mental disorder (Murphy, Donovan and Smart forthcoming). The narrow construal is strongly internalist: the only genuine psychological capacities are those realized by cognitive architecture internal to the agent. The situated view construes psychological capacities as intimately dependent upon environmental states of affairs, and so prohibits methodological solipsism. A full understanding of the capacities exercised require an understanding of agent-world dynamics.