it's also in a lot of branches of engineering you do a worst case analysis and make sure that your system will work in the worst case and then that guarantees that it'll work in all of the messy average cases that happen when you go out into a really randomized world you know with driving with autonomous vehicles there seems to be a desire to just look for think I'd viscerally tried to figure out how to mess up the system and if you can be robust to all those difficult cases then you can it's a hand waving empirical way to show that your