> You don't need to know how a plane/car/elevator works to know that it works when you use it.
I'm sure the 737 MAX seemed to work just fine to Boeing's test pilots. Observing the external behavior of a system is not a substitute for understanding its internal workings and the failure modes they carry.
I'm sure the 737 MAX seemed to work just fine to Boeing's test pilots. Observing the external behavior of a system is not a substitute for understanding its internal workings and the failure modes they carry.