Mental illness has long since confounded people who have them, their families and those attempting to treat them. The current system for evaluating mental health status entails largely a set of diagnostic criteria that are designed to standardize diagnosis and treatment. The Diagnostic and Statistical Manual (DSM) in its current incarnation is a tome of symptoms, categories and diagnoses that are useful tools for mental health practitioners coming to grips with the varied presentation of behaviors that are characteristic of individuals with varying experiences. There is a vast difference according to all diagnostic measures, between anorexia nervosa, for example, and schizophrenia. Anorexia is defined as: