Authenticity v. Accuracy
The Fine Article mentions: <<Open-source bod Watkins sighed: "All of these systems were developed with the idea everyone wanted everyone else to have accurate data, for safety, and there are few checks and balances in place to validate the authenticity of the data.">>
Watkins may have been addressing GPS Spoofing, but the story here seems the opposite. The flight data was authentic, i.e. coming from the aircraft in question, but not accurate, as some of the aircraft systems did not know where they were to a shockingly large degree. (And the first Redmond-trained minion who says "They were in an aeroplane" gets to repeat the feather-versus-anvil speed of gravity test from 20 kilometres AGL. Their choice of which to hold on the way down in lieu of parachute.)