 In  Section 5.2,  we examined Kant’s claim that instances of diachronic unified consciousness are able to extend beyond one person (by any criterion for being one person other than unified consciousness). If so, diachronic unity is not sufficient for singleness of person. On the standard account, brain bisection cases suggest roughly the reverse claim about synchronic unity; where there seem to be two instances of unity in one body, by many criteria there is just one person (remember, there is no question about singleness of person outside the laboratory). If so, singleness of person is not sufficient for synchronic unity. 