Gerrans, P.2006-11-292006-11-292002Philosophy, Psychiatry and Psychology, 2002; 9(1):47-531071-60761086-3303http://hdl.handle.net/2440/16152Cognitive neuropsychiatry (CN) is the explanation of psychiatric disorder by the methods of cognitive neuropsychology. Within CN there are, broadly speaking, two approaches to delusion. The first uses a one-stage model, in which delusions are explained as rationalizations of anomalous experiences via reasoning strategies that are not, in themselves, abnormal. Two-stage models invoke additional hypotheses about abnormalities of reasoning. In this paper, I examine what appears to be a very strong argument, developed within CN, in favor of a two-stage explanation of the difference in content between the Capgras and Cotard delusions. That explanation treats them as alternative rationalizations of essentially the same phenomenology. I show, however, that once we distinguish the phenomenology (and the neuroetiology), a one-stage model is adequate. In the final section I make some more general remarks on the one- and two-stage models.en© 2003 by The Johns Hopkins University PressCotard delusionCapgras delusionirrationalitycognitive neuropsychologycognitive neuropsychiatrypsychopathologyface processingJournal article002003144910.1353/ppp.2003.000758196Gerrans, P. [0000-0002-1755-8727]