Jeff McMahan has recently developed the embodied mind theory of identity in place of the other standing theories, which he examines and consequently rejects. This paper examines the performance of his theory on cases of commissurotomy or the split-brain syndrome. Available experimental data concerning these cases seem to suggest that a single mind can divide into two independent streams in ways that are incompatible with our intuitive notion of mind. This phenomenon poses unique problems for McMahan's theory that we are (...) essentially minds. I attempt to use his considered response to these cases as a weapon against his own embodied mind theory by highlighting some of the tensions in McMahan's response. In particular, I argue that in reaching his conclusion McMahan admits to something quite contrary to the very spirit of his own theory and that it is a powerful point in its support that one of the theories McMahan rejects can deal very well with these cases. (shrink)