 Not being happy with so counterintuitive a result, philosophers have responded. A response favoured by many is this. For any precise ‘one or two?’ question, there will be a precise answer. Behavioural control system? One. Groups of experienced objects unified in consciousness? Two. And so on. If so, while the one’s and the two’s wouldn’t line up as tidily as they do most of the time in people who have not had this operation, it is not obvious that the mixed answers support Nagel’s conclusion that there may be no whole number of centres of consciousness in these patients.