RR NDB
It seems the GIGO approach (used by IT professionals) could be better applied in an A/C for the sake of "Graceful Degradation" of the (effective) A/C, when PF is "suddenly inserted" in the "great loop".
Iīm not saying that the discussion about improving the system to prevent those events is wrong, quite the contrary.
However, letīs not forget, that the crew should be in the great loop all the time, also when "George" is doing the handywork. At least that was the way pilots had been trained when the aircraft was designed.