And when software on a car assumes pedestrians always have a mobile device on their person, charged and ready for a split second alert? IMO This would be an absurd design.
It'd be a tool in the toolkit, in my hypothetical. I mean, by the time autonomous cars were common enough on the road, we might all be tagged with an rfid chip as a normal identification or something... I don't disagree that it's an absurd idea, but it's just a devils advocate position I'm discussing here.