OK. Let's look.How do we know that all 27 books and no more and no less are the inerrant word of God and the scores of other writings bearing Apostolic names are not?
What was "the word" they received? From whom? What did they do with it, once they'd searched the scriptures (and found it was "so", or "no so")?
The contents of the New Testament, more specifically the Gospels and some (all?) of the successive letters would have been that "word". They survive, in so many accurately transmitted manuscripts, because the Bereans - and those like them - did as the Scriptures say. They searched the scriptures. I believe this is what Ignorant refers to (badly mispelled) as the Tenhak (it should be spelled Tanakh).
They found them so. The texts survived, were copied faithfully, and only later assembled into a single canon. But they were held as scripture, since they came from first-hand witnesses to the Resurrection and were in agreement with the Written Law, long before then.
I'm afraid I don't see how that actually addresses the question. What you say is true, of course. But you fail to address how we know, as you say "the texts...were ehld as Scripture," "came from first-hand witnesses," or were "in agreement with the Written Law."
There's a very simple answer to this that doesn't require the reader to become an expert in archeology or literary manuscripts or history or anythign like that. Blessed are they who do pursue those things, but for most believers the inspiration and authenticity of the canon is transmitted by God's Church.
SD