Diagnosis or Opinion?

Psychiatrists have over the past 50 years continued to diagnose patients on the basis of opinion. Today the "bible" of psychiatrists is the DSM, or the Diagnostics and Statistics Manual, while this does not contain statistics it does include list of claimed "mental illnesses." While these "illnesses" are entered into the DSM through a meeting of the APA where a new "illness" is introduced for voting, majority vote rules the illness into the DSM or not. This not related to laboratory testing of any kind.