If Apocrypha and Tradition, Then Why Not the Book of Mormon

Some time ago I had a discussion with a Roman Catholic who said the doctrine of Sola Scriptura contradicts Scripture. I was told that there is no verse in the Bible that tells us which books should be in the Bible, therefore we need the Roman Catholic Church to tell us infallibly which books should be in the Bible. I was also told that according to 2 Thessalonians 2:15, we have a body of Apostolic Tradition outside of Scripture that Christians must consider equal with the Bible.

There are two questions I have asked over the years to the above beliefs of the Roman Catholic. I assumed since Roman Catholics are in total unity (since the teaching of the Bible Alone has caused atlease 30,000 denominations and that Rome is soooo monolithic), that I would hear well defined answers and that Roman Catholics would be consistent in giving those answers. The first is "What are those Traditions?" and the second is "Did the Jews know what the Scriptures were before Jesus arrived on the scene?"

You might be quite surprised, but Roman Catholics are hardly united on their answer to the first question. The reason is simple. Which Traditions should we believe? Is there an infallible list of Traditions that Rome has provided? To my knowledge the answer has been "Nope."

What about the second question. Did the Jews know what the Bible was before Rome pronounced the Canon (which Rome did not do till the Council of Trent)? Why did Jesus argue from Scripture (an assumption He never proved and was accepted fully in His day) as the Sole God breathed authority and held men accountable to its teachings? Why did Jesus teach that ALL traditions must be tested by Scripture?

So if there is no infallible index to tell us what books should be in the Bible, how do we know what books should be in the Bible? We'll begin to look at that question next time. For now, I think it is safe to say that an epistemology that says "Believe Mother Church because our interpretation of the Bible and history must be true because we say so..." is circular and indefensible.

I once saw a Roman Catholic argue with two Mormon missionaries. Both were arguing from their ultimate authorities, their Mother churches. If Rome is right in her method of how we know truth, why not Utah?