I think this is a mostly a false dilemma. It makes most sense that if a collision is unavoidable, brake <i>hard</i> to minimize overall damage/injury. There is no reason a computer-driven car should ever unavoidably find pedestrians in its path except when the pedestrians recklessly got into the car's path. Therefore, why inflict injury to the innocent passengers to save pedestrians who are at fault? It seems like braking and hoping for the best is the best solution, for human drivers as well as computers.