That's a high bar. A human driver with a split second to decide may not be able to do that consciously. Maybe robocars should only have to do as well as a human driver?
Manufacturers' liability for lawsuits would seem to require such a high bar? Eventually industry might be able to change the law such that the lives of children in the road are devalued (or perhaps such that animals in the road are valued more highly than car passengers?), but that will take time. Before that happens, a robocar that can't tell the difference just might have to drive real slow.