Airplanes are equipped with software and many pilots would turn on auto-pilots after a long take off. Bugs are everywhere, and it's just a matter of time before

Airplanes are equipped with software and many pilots would turn on auto-pilots after a long take off. Bugs are everywhere, and it's just a matter of time before one is so critical and kill people. So our best bet is better quality assurance through proof and overtesting (do this incrementally!)