Those who formulate doctrines of Scripture tend to focus on some classic statements which sound like they can be turned quickly into dogmatic statements. Phrases like “All Scripture is God-breathed” in 2 Timothy 3:16 and the like.
I think those who want to determine and define what the Bible is ought to spend more time looking at what these writings show themselves to be.
One great example, which came up in my Sunday school class yesterday, is Hebrews 2:6. There the author prefaces a quotation from Psalm 8 with the words, “But there is a place where someone has testified.”
Any view of the Bible and its inspiration which cannot allow its human authors to have occasionally forgotten where something was to be found is contrary to the evidence from the Bible itself, and no proof-texting should be accepted as justifying a doctrine that simply doesn’t fit evidence such as this.