Outside the Box: on the ‘extended mind’ hypothesis
Christopher Norris
Abstract
In this essay I examine various aspects of the ‘extended mind’ (EM) thesis proposed by David Chalmers and Andy Clark. Their claim is that various items of extra-cranial equipment (ranging from notebooks to iPhones) are so closely bound up with the mental processes of those who use them that they must – on a ‘parity principle’ – count as parts or integral components of the users’ minds. Opponents of the thesis typically object that minds don’t have parts, that the devices in question are themselves products of human ingenuity, and that intentionality – the mark of the mental – cannot be attributed to notebooks or iPhones without falling into gross confusion. In response the advocates of ‘strong’ EM run a range of arguments, mostly of the slippery-slope kind, in order to press their point that there is no way to draw a firm or principled line between ‘internal’ and ‘extraneous’ modes of mental extension or cognitive enhancement.

