I don't want to impose in your discussions with others, and I personally have no dog in this fight. Can you answer a question for me?
How can one say this..."Sola scriptura is from man, not God. It is not an orthodox Christian concept."
and have a beautiful tag line like this...(Ignorance of Scripture is ignorance of Christ. St. Jerome)
Again, no arguments from me, I am merely curious.
Simple.
I do not confuse sola scriptura (which is a theory on how the scriptures are to be viewed and used) with the scriptures themselves.
The scriptures were inspired by God. Sola scriptura was inspired by Martin Luther.
I do not confuse the US Constitution with a theory on how the US Constituition is to be handled or interpreted (e.g. "strict constructionism").
One can be very knowledgeable about scripture as early orthodox Christians were, and wholly ignorant of sola scriptura since it was merely a theory of handling the scriptures not yet invented (unless we want to talk about the Arians use of a similar mistaken concept).
I have been asked the same question you asked by Protestants a number of times. I find it shocking that Protestants cannot tell the difference between the Word of God and a latter day theory of how it should be handled. How could anyone ever confuse the two? It's much like when Marxists confuse the real data of History with the Marxist interpretation of History. This sort of confusion is devastating to a proper understanding of the substance confused. This is why Marxists ignore some historical realities. They cannot accept they exist because they do not fit in with their theories.
Never confuse a thing with a theory on how that thing is supposed to be handled.