It means a car that can drive in a reasonably broad range set if expected traffic conditions and has no failure mode that is unsafe at any point. It’s that sec

It means a car that can drive in a reasonably broad range set if expected traffic conditions and has no failure mode that is unsafe at any point. It’s that second part that is the important one. If the car can’t drive in heavy snow or roadless areas or whatever that’s fine, as long as it’s able to recognize and avoid those situations in a graceful way, like refusing to engage with them and parking in a safe area, suggesting the trip be cancelled, that kind of thing. The current approach of it works, but when it doesn’t it will say “just kidding take over for me now” while going 70mph towards the side of a truck is definitely not that.