MFS, (agreeing with HM # 145), in this instance the AoA input might have been affected by a suspect ADIRU; there is no evidence of that, but there is valid supposition that the crew disbelieved the AoA derived stall warning.
However, the irony is that the requirements for an independent highly reliable stall system warning implies that AoA would be available for both stall warning and THS reposition – even an auto stall recovery (akin to a super stick push). The mechanism might be similar to existing Mach trim functions in the flight control computer.