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- Lisa Bortolotti (2009). Delusions and Other Irrational Beliefs. Oxford University Press.This is a monograph which contributes to the debate on the nature of delusions and to the literature on the conditions for belief ascription. There are numerous challenges to the view that delusions are beliefs, and many of these are due to the conviction that there needs to be a background of rationality in the behaviour of the people we ascribe beliefs to: delusions cannot be beliefs because (a) they are badly integrated with the subject’s other intentional states; (b) they are not supported by and responsive to the evidence available to the subject; (c) they are not consistently acted upon. Here I attempt to show that the arguments against the doxastic conception of delusions are misleading when they are based on an idealised notion of belief, and I present many examples of irrationality in paradigmatic cases of belief. As a result, I maintain that we should give up (once and for all) the assumption that belief ascription is hostage to the satisfaction of norms of rationality. By bringing together recent work in philosophy of mind, cognitive psychology and psychiatry, the book offers a comprehensive review of the philosophical issues raised by the psychology of normal and abnormal cognition, defends the doxastic conception of delusions, and develops a theory about the role of judgements of rationality and self-knowledge in belief ascription.
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