Originally Posted by
roulishollandais
Am I allowed to suggest to read Ziegler's book to make one's own idea?
Please, be my guest! I for one did this long ago
People who will follow your suggestion will soon discover the sentence just before the one you quoted from p.79, which explicitely describes that the FBW technology made it possible to implement "protections" against flight envelope departure before giving some examples (= your quote); this allows any pilot who have read his manual, or even only the ECAM to understand that
protections lost means that he now can execute a barrel roll, exceed the speeds limits or stall the aircraft.