Replies

"First of all, the Councils of Carthage and Hippo did not establish the canon for the Church as a whole. The New Catholic Encyclopedia actually affirms the fact that the Canon was not officially and authoritatively established for the Western Church until the Council of Trent in the 16th century and that even such an authority as Pope Gregory the Great rejected the Apocrypha as canonical:
St. Jerome distinguished between canonical books and ecclesiastical books. The latter he judged were circulated by the Church as good spiritual reading but were not recognized as authoritative Scripture. The situation remained unclear in the ensuing centuries...For example, John of Damascus, Gregory the Great, Walafrid, Nicolas of Lyra and Tostado continued to doubt the canonicity of the deuterocanonical books. According to Catholic doctrine, the proximate criterion of the biblical canon is the infallible decision of the Church. This decision was not given until rather late in the history of the Chruch at the Council of Trent. The Council of Trent definitively settled the matter of the Old Testament Canon. That this had not been done previously is apparent from the uncertainty that persisted up to the time of Trent (The New Catholic Encyclopedia, The Canon)."