This selfish driver is flesh and blood. You want to give him the choice of setting his car's ethical guidelines. That would make him relevant - and, I maintain, predictable. Now, they are made of straw. They don't get to decide on the pre-setting when the car is purchased. They don't get a say in what happens. It's possible that a father, who normally drives in a heedless and inconsiderate manner, would choose a setting to save his own DNA, in all its little vessels and containers, rather some anonymous DNA. But it would still be a selfish choice. No, I'm one of the 38 drivers in Ontario who respect speed limits and stop signs, even at night, even on a deserted road, and I stop to let turtles cross. Impatient drivers would hate me, except that I make it as easy as possible for them to pass whenever it's safe. I have no frickin' idea what I would do in that hypothetical situation. neither do you. When there is no time to think it over, we act on reflex, and it's neither controllable nor predictable. But, because I'm a careful driver, it doesn't happen.