Family, watching a hospital show: "Is any of this real?" Me: "Some of it." Family: "Which part is wrong?" Me: "He called it a stroke from the doorway." Family: "He could see her face." Me: "So could I. Faces are the easy half." Face-arm-speech screens are built to be fast and sensitive, not to be a diagnosis. They are tuned to the front of the brain's blood supply, which is why posterior-circulation strokes — the ones that arrive as sudden vertigo, double vision, a lost half of the visual world, or a person who simply cannot walk straight — are the ones most often missed at the door. The face is the easy half. Send this to whoever quotes a TV doctor at you. Send this to whoever quotes a TV doctor at you.