Professional identity is a visit card. Personal ID is a portrait in a passport, a picture taken according to the rules and restrictions of its time. For ten years I had a fake identity: wearing a wig from 1971-1981 because I suddenly became bold at the age of 11. Then my hair grew back for twenty years and I lost it again in 2000, after defending my dissertation. On the photograph in my passport from 2007 I am bald.