> the truth came from A, not from the passage How can an interpretation attesting the truth of two passages exist while the passages are individually untrue? There seems to be a logic error here.

> what they're effectively claiming is that their interpretations are inerrant.

I don’t think A is claiming that, as the most basic understanding of Christianity understands that the individual is terribly flawed and errant.

If your presupposition for this conclusion is based on your earlier point might have either misstated something or you’re claiming a conclusion without an expressed premise.