"...stand fast and hold the traditions which you were taught, whether by word or our epistle."
*Traditions* specifically passed on by Paul.
And those were? How do you know? From what source did they come and how can you be sure that they were faithfully and accurately passed on?
And where does it say in those verse that tradition is of equal authority and standing with Scripture? Or that Scripture should be interpreted in context or light of said tradition?
And we're right back to the man-made tradition of Sola Scriptura.