Says respected theologian and author Dr. Robert Reymond concerning apostate Roman Catholicism and its circular reasoning:

Because of its views on Tradition Rome also rejects most of the great attributes of canonical Scripture which Protestantism holds in the highest esteem, namely, Scripture’s self-canonization, its inerrancy, its necessity, its self-attestation, its sufficiency, its perspicuity, and its finality.

So historic Protestantism and Roman Catholicism do not share the same Bible, either extensively as to the number of books or intensively as to the nature of Holy Scripture itself. For Protestantism the Bible alone (sola scriptura) is self-validating and absolutely authoritative in all matters of faith and practice; for Roman Catholicism its enlarged Bible (and this applies to any statement in it) has only the meaning and thus the authority the Roman Church has determined to grant to it at any given moment.
(The Reformation Conflict With Rome: Why It Must Continue, 28,29)