@MDWolinski “.. while the MCAS system relied on two sensors ..”

MCAS used only the one sensor, this decision made so as to avoid recertification.

http://www.b737.org.uk/mcas.htm

“Are we vulnerable to single AOA sensor failures with the MCAS implementation or is there some checking that occurs?”

https://www.aviationtoday.com/2019/11/02/boeing-ceo-outlines...