> If it does turn out to be the faulty AOA indicator causing the electric trim to go nose-down, there are still a number of other obvious contributing factors i

> If it does turn out to be the faulty AOA indicator causing the electric trim to go nose-down, there are still a number of other obvious contributing factors in addition to the faulty sensor. There's no serious argument here. It isn't airworthy on an airliner to have a system with flight control capability using one sensor with no redundancy. It doesn't happen anywhere else and there are regulations that forbid it. Airbus uses AoA for autopilot and therefore puts three AoA sensors on the plane with majority voting. It appears that Boeing (during certification) either lied about the severity of MCAS failure, or lied and said they were using two sensors when they weren't.