Canonicity

Thus, the question of which canon is correct is indistinguishable from the question of which God exists. “In fact it then appears that the argument for the Scripture as the infallible revelation of God is, to all intents and purposes, the same as the argument for the existence of God.” (The Defense of the Faith pg. 109 Van Til) Therefore ‘the indirect method of reasoning by presupposition’ must be employed to answer this question of canonicity.
For more research in this area:
The Origin & Authority of New Testament Canon | Dr. Michael. J. Kruger
• PART 1 Introduction to Canon | The Or...
https://www.youtube.com/watch?v=SUvJQmduAdA&list=PLzytIUBlFDMN62nZiv6cPVBYoBaCPJjQM&index=1&t=0s