 According to an internalist or scaffolded/situated approach, external artefacts (such as notebooks) or other agents (such as life partners) can only be props that compensate for an incapacity. On this view, Otto suffers from a deficit Inga does not have, and is thus less healthy than she is. However, if we think, as externalists do, that Otto’s notebook is a part of his cognitive architecture, we should attribute him the same capacity to remember as Inga, for the only difference between Otto and Inga, in this respect, is that Otto’s psychological capacity is realised by an agent-environment system of which he is part.