Evaluating the Validity of Schizophrenia; The Background: Events Leading Up To The Introduction of Schizophrenia; The Necessary Conditions for Inferring Schizophrenia - 1: The Development of Diagnostic Criteria; The Official Correspondence Rules for Inferring Schizophrenia - 2: DSM-III, III-R and IV; Genetic Research; Supporting and Maintaining Schizophrenia: Language, Arguments and Benefits; Living Without Schizophrenia - Issues and Some Alternatives.