“And just again, to kind of give you the motivation. I really want a robot. This isn't my kitchen, by the way, just in case you were worried, my kitchen. But imagine that you had to clean this kitchen or make breakfast in it or something. It would be very hard. And imagine programming a robot to do it. It's extremely hard. And so one thing that's useful to do is to think about what makes this problem hard. So one of the things that makes it hard is that there are lots of objects.”