 A wide account tells a different story. Otto’s mental health is not compromised, whatever the state of  his brain, because using his notebook he can store and retrieve memories in a functionally equivalent manner to Inga. Poor mental health can be the outcome of neural dysfunction, but it can also owe to problems with the environments in which agents are situated, as well as with their capacity to fruitfully exploit environmental resources (Sneddon 2002; Roberts, Krueger, and Glackin 2019). The externalist claims that she can discern types of explanations, interventions and strategies that an internalist picture misses.