Do you have a dorkdar? Most of us have: a sensor in the cerebral cortex that alerts you when someone in the near vicinity is being, well, a dork. Mine has gone off twice in recent weeks: on both occasions during interviews with technology tycoons. Not, I hasten to add, on account of the person being interviewed but because, while we’ve been chatting, an employee has casually rolled past us on a scooter. Yes, a scooter. Indoors.