[calibas]

Fair enough, so then how fast would a semi-attentive driver stop?

The comment I originally replied to makes the claim a human's brain wouldn't have even responded fast enough to register the child was there. That's going WAY further than how Waymo is claiming a human would have responded.

I don't see how that's a more reasonable assumption that a human driver actually being "fully attentive", and I'm not sure Waymo's definition of that term is the same as what you're using.