M.D. Can Also Stand In For "Mostly Delusional"

"Most recently, he was going on and on about how he has taught medical students for decades and how his experience as a physician and in clinical practice allows him to 'recognize B.S.' when he sees it."

-- Orac, tearing apart Michael Egnor, who is the worst form of quack - a quack with credentials - who are those, most clearly, deserving of Respectful Insolence.