Robots have been taking jobs from humans for decades now, replacing bank tellers with ATMs, cashiers with self-checkout machines, and factory workers with mechanized assembly lines. The fear, of course, is that the bots will grow so intelligent -- and low-maintenance from a management perspective -- that they'll replace us altogether. In a recent New York Times column, Neil Irwin explains why that might not be as likely as some naysayers predict. Why? For one thing, robots don't have a lot of common sense.