Clark and Chalmers’ Extended Mind Thesis claims that elements in our environment, beyond the skull, do not just deserve epistemic credit, but can be considered as a part of our mind. I will argue that their distinction between internal and external elements is not sharp but gradual, raising questions about the notion of “extending” the mind. I will look both backwards and forwards in time for support, to Franz Brentano’s conception of proper vs symbolic presentations and to the future technologies of the HERMES project.