[.45 Long Colt]

“And how do you know what’s authentic Scripture and what isn’t? How do you know the Bible is God’s word?”

How do you know the pope is infallible?

[Romulus]

I have the Church to help me with those questions.

Now — what about you? Who’s your authority? How do you know? Are you your own infallible pope?

[Cronos]

The Pope as an individual non-ex-cathedra is fallible. if you, .45, want to argue, understand what you’re arguing about. Papal infallibility has nothing to do with the fallibilty of the person itself holding that office — who is a fallible being. P.i. is specifically that on matters of doctrine, when pronouncing a decision on matters and only when spoken with the authority invested in the chair of Peter, under the grace of God and thanks to the Holy Spirit — only that decision is infallible.

[Cronos]

Though the question still holds -- "And how do you know what’s authentic Scripture and what isn’t?" on what basis would you say that the Shepherd of Hermes is not to be added in? And also note that Luther called the Epistle of St. James as the epistle of straw

and, also Jewish canon was only closed in AD 70 -- yes, 40 odd years after Christ's death

Marcion ws the first to put together a Biblical canon: This included 10 epistles from St. Paul, as well as a version of the Gospel of Luke, which today is known as the Gospel of Marcion.

Or, Origen of Alexandria whose canon include all of the books in the current Catholic canon except for four books: James, 2nd Peter, and the 2nd and 3rd epistles of John but included the Shepherd of Hermas

And the oriental Churches like the Georgian (remember the earliest Christian state) never accepted the Revelation of John.

so how do you know that the list of inerrant books you have is complete or contains extra books?