Let me ask you something. Is God perfect? I think you'd answer yes. That means He's without error. If He is without error then if He were to provide us a book to live our lives from, that book would be without error also. If the book were found to be in error, even in a small part, then that calls into question the entire book. It would allow man, as he is today, to determine what parts of the book are correct and what parts are not. This really isn't that complicated and I don't know why you and others have such difficulty with that concept.
This argument has the signs of the tail wagging the dog.
First is the problem of the attributes of God being used to argue for the perfection of Scripture. Perfection is a uncommunicable attribute, not a communicable one. The next problem is that it assumes from the start that the Bible claims for itself either perfection or that it shares in the attributes of God in some way. This appears to make the Scriptures the fourth member of the Trinity, rather than something spoken out by God.
The argument bases the authority and inspiration on the perfection of Scripture specifically on the issue of errancy rather than the infallibility on the authority and inspiration. That is what i mean but the tail wagging the dog. Nowhere does the Scripture claim for itself perfection, but rather it makes the claim of goodness and usefulness and trustworthiness based on these communicable attributes of God. We can understand good, and suitable, and trustworthy without claiming perfection.
Look at:
http://homepage.mac.com/shanerosenthal/reformationink/bbwauthority.htm
and how Warfield makes the case for the authority and inspiration of Scripture.
but through the instrumentality of a body of apostles, chosen and trained by himself, endowed with gifts and graces from the Holy Ghost, and sent forth into the world as his authoritative agents for proclaiming a gospel which he placed within their lips and which is none the less his authoritative word, that it is through them that he speaks it. It is because the apostles were Christ's representatives, that what they did and said and wrote as such, comes to us with divine authority. The authority of the Scriptures thus rests on the simple fact that God's authoritative agents in founding the Church gave them as authoritative to the Church which they founded. All the authority of the apostles stands behind the Scriptures, and all the authority of Christ behind the apostles.
he is arguing from the Apostolic ministry to the authority of the NT. Not that the apostles wrote perfectly so that perfection requires obedience.
This is what is called inspiration. It does not set aside the human authorship of the books. But it puts behind the human also a divine authorship. It ascribes to the authors such an attending influence of the Spirit in the process of writing, that the words they set down become also the words of God; and the resultant writing is made not merely the expression of Paul's or John's or Peter's will for the churches, but the expression of God's will. In receiving these books from the apostles as law, therefore, the Church has always received them not only as books given by God's agents, but as books so given by God through those agents that every word of them is God's word.
The inspiration is foundational to the authority, not that the apostles shared in the perfection of God but that God superintended their writing so that it was what God desired. Analogous to irresistible grace, the apostles wrote human words, using their human instrumentality yet these are words suitable to God's purposes, they are what God intended to be enscriptured.
It is a complex issue, the current inerrancy debate turns the traditional arguments for the inspiration and authority of Scripture literally upside down, basing the authority of Scripture on the nature of Scripture as perfection, as if God could share this attribute with anything created. And that we are supposed to consent to the authority because of this perfection. Rather than we echo the inspiration of the apostles by being moved by the same Holy Spirit as preserved their writing.
anyhow, i am still confused. i don't see the claim in Scripture that it shares the perfections of God, nor do i see that the perfections are what makes it authoritative. but i do see the logic that if you base the authority of Scripture on it being perfection itself that any challenge to that attribute would bring the authority down as well as demonstrate that it is not perfect. Which appears to me to make the argument very brittle and unyielding to the problems of sin effecting not just the transmission but the translation and interpretation of Scripture. You are not handling the perfect Scripture when you pick up an English Bible so however can it be perfect and authoritative?
this appears to be more like the Islamic defense of the Quran as a heavenly eternal book in Arabic just brought to earth by Mohammed rather than the traditional doctrine of inspiration.