compelling and sophisticated book ... the general approach in this book owes a great deal to Wittgenstein, relying heavily as it does on an analysis of how psychological terms function in everyday language, and it is refreshing to see this approach so scrupulously applied to contemporary problems ... this book is a stimulating read and I would happily commend it to anyone working in these, and related, fields of research ... Whether or not you are ultimately convinced by the arguments themselves, you will be impressed by the depth and clarity of the exposition.