Says Graybeard:
The A330 Autopilot can't handle varying erroneous airspeed from 3 sources, so it disconnects and hands the task to the pilot. That shows a lack of forethought.
Tell me... if the computer knows it is getting "varying erroneous airspeed from 3 sources" and does not know which one to believe, what should the computer do... keep flying the plane itself basing its judgments on known bad data or hand the job to a human?
Did ya even think that comment through before you made it?