An anonymous reader writes "Following a BBC report showing abnormal variation in the number of people taken into police custody with mental health problems, concerns have been raised about the legal definition of "mental illness". Prof. Steve Fuller argues that a much sharper legal distinction is required to ensure criminals with mental disorders are not released without appropriate treatment. Fuller distinguishes between two cases: a 'client', who pays a therapist and enjoys a liberal, level-playing field in face-to-face interactions, and a 'patient' who is being treated by a doctor for a particular disorder. If the former relationship cannot be established due to person's mental state, then the latter one should be enforced. Thus, Fuller calls for 'a return to institutions analogous to the asylums of the early 19th century.'"