Robots never tire as opposed to human beings. They do, however, have problems interpreting the data streaming in from the cameras and laser scanners that are their eyes. Seeing where one box in the back of a crowded lorry ends and another begins is second nature to a human being. But even the best artificial-vision systems struggle to cope. On the other sides lifting irregular objects will be a problem to the robots as People learn how to do such things gradually, as they grow up. And machines have to learn, too. What should the robots do and not do ?