 Another difficulty with Maher’s original account of delusions as ‘false but reasonable’ is that, even if the unusual nature of the experience were to satisfactorily explain the acceptance of the delusional hypothesis and the formation of the delusion, this would not be sufficient to guarantee that the behavior associated with having delusions is overall rational. An explanation is needed for why delusions are maintained in the face of counterevidence once the delusional hypothesis has been formed and endorsed (see Gerrans 2002a). One aspect of the notion of rationality for beliefs is that we are disposed to revise or abandon beliefs that seem to be in conflict with the acquired evidence. The “incorrigibility” of delusions speaks in favor of their being held irrationally.