But it's not the only one. Sola Scriptura is a snake eating its own tail. You needed the Tradition of the Church to compile the Bible in the first place. And remember that the Bible says itself that it does not contain all that Jesus and the Apostles said and did.
If the Bible is not it's own verifier of truth, then there is no truth.
If anything contradicts the Bible, or adds to what is taught, then that is not a biblical thought/idea/action.
Not even debatable.