"Proving that Scripture is the sole rule of faith by referring to Scripture is illogical on its face."
I need to re-phrase that - Asserting that Scripture is the sole rule of faith..."
What about the first 400 years, when Christians had no New Testament? What was their rule of faith? For the Canon was not decided until the Council of Carthage in 397. Without the authority of the Catholic Church, there is no Canon. "I would not believe a word of the Gospel unless moved thereto by the authority of the Church." (St. Augustine) There simply is no other reason to believe Scripture.
Do you honestly believe the Christians of the first 4 centuries had no record of the revelation of God? There were Paul's letters circulating, Peter's letters, the Four Gospels of Matthew, Mark, Luke, and John...and on and on.
Later on, consensus was arrived at...but the writings were around for all of that time. The Roman Catholic Church did not originate the "Book" 400 years after Christ.