The CA response addressed their interpretation of what sola Scriptura means and they happened to also cite the verse I referenced in John 20, but I was not talking about that point (SS) in my response to Metmom's comment regarding "denominationalism".
I do, as a matter of fact, ascribe to the actual doctrine of sola Scriptura, but my faith is based upon Jesus Christ and the good news (gospel) of His shed blood for the propitiation of our sins so that because of the grace of God, we have everlasting life through faith in Him. All the doctrines that make up the MAJOR tenets of the Christian faith ARE found in Holy Scripture and nothing that we MUST know for our salvation was omitted.
Whose/ Which doctrine of SS do you subscribe to? I have read and heard variations from James White, Ron Rhodes, David Jeremiah, etc...
Second, the verse from Johns Gospel tells us only that the Bible was composed so we can be helped to believe Jesus is the Messiah. It does not say the Bible is all we need for salvation, much less that the Bible is all we need for theology; nor does it say the Bible is even necessary to believe in Christ. After all, the earliest Christians had no New Testament to which they could appeal; they learned from oral, rather than written, instruction. Until relatively recent times, the Bible was inaccessible to most people, either because they could not read or because the printing press had not been invented. All these people learned from oral instruction, passed down, generation to generation, by the Church.