[fhub]

His argument is that a t-shirt can be on the floor and there are stairs etc. But a truck could drop anything on the road, any sort of animal could cross the roads, sink holes could form in roads etc. I feel he is conflating what is often a problem for his robots with what is often a problem for autonomous vehicles. Rather than what each of them must be able to handle irrespecive of how often they happen. Then there is weather etc etc.