So I think there are two distinct issues here. The first is whether a book should or should not be included in the Bible. On this issue, there has historically been broad agreement on most books, but certain books have been accepted by some churches and not by others. I think that for those books which everyone clearly accepts, one could infer that those are inspired. As for the others, I’d say there is much less certainty–simply because there is no consensus and direct revelation on the matter.
I used the book of Jeremiah above as a case in point. The Greek texts of Jeremiah and the Hebrew texts are pretty radically different–to the point where one is more than 10% longer than the other. The verses at some places are also in a different order. So even once you’ve decided that Jeremiah as a book should be part of the Bible, you still have to ask: “Which Jeremiah?” There is no revelatory guidance–only traditions–and they vary.
The second issue you asked me about was infallibility, which I think of as quite a bit different from a work being inspired. Simply because a particular writing is “useful for instruction” doesn’t mean it’s absolutely perfect. Even if all Christians could agree on which books should be in the Bible, which they don’t, we still wouldn’t know which manuscript to point to and say “this one’s infallible.” And if you can’t do that, then any assertion of infallibility seems totally illogical to me.
There is absolute certainty as to the identity of Sacred Scriptures. The canon (unchanged for 1600 years) has been defined by the Catholic Church founded by Jesus and guided by the Holy Spirit, in which resides the fullness of truth:
120 It was by the apostolic Tradition that the Church discerned which writings are to be included in the list of the sacred books. This complete list is called the canon of Scripture. It includes 46 books for the Old Testament (45 if we count Jeremiah and Lamentations as one) and 27 for the New.
The Old Testament: Genesis, Exodus, Leviticus, Numbers, Deuteronomy, Joshua, Judges, Ruth, 1 and 2 Samuel, 1 and 2 Kings, 1 and 2 Chronicles, Ezra and Nehemiah, Tobit, Judith, Esther, 1 and 2 Maccabees, Job, Psalms, Proverbs, Ecclesiastes, the Song of Songs, the Wisdom of Solomon, Sirach (Ecclesiasticus), Isaiah, Jeremiah, Lamentations, Baruch, Ezekiel, Daniel, Hosea, Joel, Amos, Obadiah, Jonah, Micah, Nahum, Habakkuk, Zephaniah, Haggai, Zachariah and Malachi.
The New Testament: the Gospels according to Matthew, Mark, Luke and John, the Acts of the Apostles, the Letters of St. Paul to the Romans, 1 and 2 Corinthians, Galatians, Ephesians, Philippians, Colossians, 1 and 2 Thessalonians, 1 and 2 Timothy, Titus, Philemon, the Letter to the Hebrews, the Letters of James, 1 and 2 Peter, 1, 2 and 3 John, and Jude, and Revelation (the Apocalypse).
Disagreement with the Catholic Church regarding the canon is no different than any other issue of contention another church (or a person) might have with the Catholic Church. Consensus doen’t enter into it. For example, it is worth noting that the books of the Deuterocanon are regarded in the Orthodox Church as canonical but of lesser authority than the rest of the bible. This is not the Catholic view which awards them equal authority with the rest of Scripture. For what it’s worth, ALL the books appearing in the Orthodox bible which are missing from the Catholic canon are considered by the Orthodox to be in this same category (although the Greek church omits the Prayer of Manasseh and adds 4 Maccabees in an appendix).
As to the specific content of Scripture, this to has been addressed by the Church, the only authoritative interpreter of the Word of God (
CCC 85). While the Church encourages biblical scholarship and also translations utilizing the original languages, the following concerning the Scriptures in Latin remains authoritative:
Moreover, the same sacred and holy Synod,—considering that no small utility may accrue to the Church of God, if it be made known which out of all the Latin editions, now in circulation, of the sacred books, is to be held as authentic,—ordains and declares, that the said old and vulgate edition, which, by the lengthened usage of so many ages, has been approved of in the Church, be, in public lectures, disputations, sermons and expositions, held as authentic; and that no one is to dare, or presume to reject it under any pretext whatever.—
4th Session, Council of Trent