At the end of the day, in brief summary: inerrancy is interested in the truthfulness of Scripture and it is a powerful way forcing people to think about that reliability that is God-given.

It's not a matter of us standing outside it and ticking off the boxes: yes, the Bible is faithful here; yes, it's telling the truth there, and so on, but rather granted that it's God-given. It's the frame of reference that shows us how to live in, tells us how to think about everything.

The notion of the enduring authority focuses on the fact that some people think that notions like authority of Scripture's is passé, while others say that the present configuration of the doctrine of inerrancy is a late addition. And to both we want to say, No we're talking about the enduring authority of Scripture, grounded first and foremost in its relevatory status, something given by God and utterly reliable.

The New Testament writers I think conceive of their inspired Scripture writings as flushing out, bringing to articulation, expounding and so on the climactic revelation in the son, but this in self-conscious fulfillment of the promises and covenants that were already made to God's chosen people in Old Testament times.