Pursuing the academic point, does alpha-prot have authority to drive the elevator to its AND limit?
From the ATSB (interim) report on QF72:
The aircraft manufacturer advised that the 10-degree elevator command associated with the first in-flight upset, was the result of 4 degrees of alpha prot and the 6 degree authority of the anti pitch-up compensation. The 10-degree command was close to the worst possible scenario that could arise from the design limitation in the AOA processing algorithm.