Aside from the fact that I don’t see how you can calculate a rate off two data points (without really wide error bars), I also don’t understand how fault doesn’t matter. If neither of these were Waymo’s fault, then Waymo has never caused a fatal accident, whereas we can assume that nearly all of the fatal accidents that make up the rate you’re comparing it with were caused by a human, right? Well, at least the ones that were someone’s fault as opposed to random chance or something.