Most of us are trained to recover a stall as soon as it is recognised, at the incipient stage. Or, if instructed to; at the first wing drop. We do so primarily by pitching down to unstall the wing.
As I understand it; AF447 was held in a stall for an extended period, with full back-stick, resulting in low forward IAS, and high downward V/S, during which time, the Stab trim wound NU as far as the FBW allowed.
Call that what you want, but it wasn't really a 'normal' stall situation that we are all used to recovering from.
For the court case: How was that pilot trained? Was he trained? What part of his training told him to hold full back-stick during a stall?