One of the ways we know that a teaching is most likely a teaching that was held everywhere(all regions of the Church) is when it doesn't cause a ripple in the Faith. PM caused a fued in Alexandria and Rome. The doctrine of the Trinity did not. The early ripples we see in regards to the issue of God are from Marcian, Noetus, Praxeas, and Arius, and maybe a few others.
People who teach heretical stuff do stick out like sore thumbs.
What I am saying is that we can trust them for if one got it wrong, then the others who heard the same apostle would of corrected the one who miss-understood. And if the person refused to change, then it would of caused a ripple in the Faith.
Back to Apostolic tradition:__Now you are saying that only a few were able to listen to an Apostle. That is wrong. Anyone in the same Church plant was able to hear the same Apostle. Now it is true that for the ones who wrote, we only have a few that sat at an Apostles feet. And for those that wrote, if their letters were passed around and copied from Church to Church (and region to region) then the other churches had a chance to check out the doctrinal teaching of those who wrote, and if they were teaching something that didn't line up with the Apostolic tradition of their region, then it would of caused a ripple in the Faith.
Jnorm has just given us the ripple argument for Clementine ornithology. To my knowledge, Clement’s avian proof for the Resurrection didn’t generate any ripples. Didn’t stick out like a sore thumb.
So the immortality of the phoenix must go all the way back to the apostles. After all, if Clement misunderstood what an apostle was saying about the phoenix, other listeners or other churches would have corrected him. And if he didn’t recant, that would have caused a ripple. He would stick out like a sore thumb. Hence, Clementine ornithology figures in the deposit of faith. He who refuses to profess the immortality of the phoenix is anathema.