The "challenge" isn't incompatible with anything I've said - Alpha Max is the (effective) constant, Alpha Prot and Alpha Floor thresholds are variables computed from Alpha Max taking the aircraft's attitude and flightpath into account.
The FBW system does not have any concept of "stall" or "operational ceiling" programmed into it as discrete entities, even in Normal Law (it's not that 'smart'!) - just a set of variables that should not be exceeded. Doing so will trigger protections in Normal Law and warnings in Alternate and below.