My nephew sent me this last month ...
Airbus Stall Training:
https://www.youtube.com/watch?v=4WuPoVjOXLY
... and posed this simple question: "If they knew they were in a stall, even I would know what to to do - and if they didn't realize, how is that even possible?"
Beats me.
edit to add: What Clandestino said, but with less fibre
Well unworry, your nephew, like many of the posters here, is probably not an expert in human behavioural factors as they relate to the operation of complex non-failsafe life-critical systems during abnormal life-threatening events. Which would explain why he thought a complex problem can be dealt with by a simple question.