At 2 h 12 min 02, the PF said "I don’t have any more indications", and the PNF said "we have no valid indications"....snip... In
the following moments, the angle of attack decreased, the speeds became valid again and the stall warning sounded again."
So PF doesn't think anything is working and lowering the nose appeared to trigger a stall warning. How many people in that situation would continue to trust the stall warning system was working?