What infallible authority provides the answer? The answer to what? I study the Word of God and pray for guidance - the same as people have done for millennium.
Where is your doctrine of the Bible alone in your incomplete Bible? Deut. 4:2 Ye shall not add into the Word which I command you neither shall ye diminish ought from it". Prov. 30:5,6 Every Word of God is pure. He is a shield unto them that put their trust in Him.Add thou not unto His words, lest He reprove thee, and thou be found a liar.
What is the difference between impeccability and the Catholic doctrine of papal infallibility? Who cares? More semantics.
The KJV, like all Protestant Bibles, is missing several Old Testament books.
As a believer in Luther’s dogma of “the Bible ALONE,” you lack an infallible authority to determine the cannon of Scripture. As R.C. Sproul once said, the Protestant Bible is “a fallible collection of infallible books.”
Then how do you know, infallibly, whether the Protestant cannon is correct? It’s logically impossible, given your presuppositions, and Luther’s dogma collapses.
Your proof-texts for Luther’s doctrine of the Bible ALONE prove nothing. You are pre-supposing the validity of his teaching.
Defendining “the Bible ALONE” and defending Christianity are NOT the same thing.