Vatican II’s Dei Verbum stated the obvious, that church teaching is based on scripture, tradition, and magisterium.
In EVERY Christian sect, there is scripture, as usual, but also some tradition and magisterium of some sort or other, whether they admit it or not.
As Yaroslav Pelikan, late erudite professor of church history at Yale University, said playfully, “scriptura” has never been “sola.”
If you back-track the idea in history, it simply derives to declarations of the so-called reformers. It is the most-dreaded and fundamental of Biblical errors, man-made doctrine.
They came up with their own man-made doctrine to offset what they perceived as Rome’s man-made doctrines.
If you compare scripture with the U.S. Constitution, the latter has been amended and interpreted often it seems to be inside out of what the framers intended. You have the HHS mandates which are attempting to destroy 1st Amendment freedom of religious expression and you have gun advocates whose possession of guns far exceeds the permitted “well-regulated militia.”
It’s hard to believe that even God expected bare-bones, every-man-for-himself interpretation of His word that must not change or be expanded,at least in interpretation, over time. It is ludicrous to accept divine inspiration of both or several sides of doctrinal disputes over scripture.
To examine a neutral matter of doctrine – gambling – see the entry of the Catholic Encyclopedia at this link
oce.catholic.com/index.php?title=Gambling
It was prohibited (as a form of idolatry) for 15 centuries by the apostolic canons, then the Council of Trent came along and “pencil-whipped” the doctrine to virtually nothing.