> Does the car know what a **** is? On a level below identifying stop signs and lollipop ladies and push carts, a SDC's stack needs to be able to identify: 1)

> Does the car know what a **** is? On a level below identifying stop signs and lollipop ladies and push carts, a SDC's stack needs to be able to identify: 1) Driveable areas. If something looks like a cliff maybe don't go there. 2) Fleeting obstacles. Dust blowing in the wind. A stray plastic bag, winging its way northwards to the waiting maw of a baby turtle. A person with a borderline credit score. A stray cat chasing a bug. That sort of thing. 3) Anything else that's physically present in the path of the car. Doesn't matter what it is. Do Not Hit The Thing is the second lesson anyone learns when being taught to drive, after Make It Go So Hit The Thing Is Even An Option.