?somatogravic disorientation - pitch down illusion?
Sounds like the common sense immediate response to the stall warning was ignored, but the deceleration could have created a somatogravic illusion ,shared by all, for false nose down pitch sensation, hence the repeated and probably confused "pitch up" commands.
If thats the case, everyone would have had to be ignoring the AI, the stall warning, and the angle of attack indicator....very very strange....
A worst case scenario would combine it with a tail heavy loading configuation but that doesnt appear to be the case.
Sadly, they just couldn't work out out how to fly a stalled aircraft, no ASI, albeit in very bad weather which was avoidable...