BYD, the China-based maker of electric vehicles, has done something no automaker has dared to do: It’s promising to pay every bill—repairs, property damage, medical costs—when its God’s Eye autonomous driving system causes an accident. No price ceiling. No fine print. No blame-shifting to the driver. No insurance claim that haunts you for years. Just a review of the car’s system logs, and you get your back covered till every expense derived from…