I manipulate online self testing questionnaires for attention deficit hyperactivity disorder, bipolar 2, oppositional defiant disorder, and the rest. I guess the answers to get my diagnosis. I have never failed yet. Likewise, I pore over the Diagnostic and Statistical Manual (DSM) definitions of personality disorders—narcissistic, antisocial, histrionic, and paranoid—recognising all these traits in myself. Obviously these are to be expected in a columnist. These psychological and psychiatric descriptions are interesting and to some extent useful, but are in reality just inadequate cardboard cut-out caricatures, failing to encapsulate even a …