You raise a really good question.
Yes it is but you can't answer it because it doesn't exist...
A question of similar importance is: show another provable source of what Scripture really consists of other than what the (Catholic) church has preserved and taught.
We know the Jews never accepted the Catholic spurious books...We know that Jesus never accepted those books...
Luk_24:44 And he said unto them, These are the words which I spake unto you, while I was yet with you, that all things must be fulfilled, which were written in the law of Moses, and in the prophets, and in the psalms, concerning me.
Jesus never mentions the books that you guys so badly want to be part of scripture...And he certainly doesn't include them when he speaks of scripture that will be fulfilled...That's pretty cut 'n dried...
I don’t want, or not want, one book or another to be part of Scripture. Scripture is what it is. Rather, the question is: who has the authority to determine which books are in and which books are out. Where is that list?