Originally Posted by AGBagb
Broadly speaking, the PF decided to ignore a - false, as it turned out - stall warning, ...
As I understand it, the stall warnings were not false. They occurred at AoA's of 4.48 and 4.31 degrees, while the stall warning threshold given by the Airbus engineers is 4.2 degrees. BEA's 2nd Interim Report, 1.6.11.4 confirms that by stating that the threshold is "of the order of 4 degrees":
In clean configuration, this threshold depends, in particular, on the Mach value in such a way that it decreases when the Mach increases. It is the highest of the valid Mach values that is used to determine the threshold. If none of the three Mach values is valid, a Mach value close to zero is used. For example, it is of the order of 10° at Mach 0.3 and of 4° at Mach 0.8.
The curious thing is that the threshold did not change to 10° when the speeds became invalid.