Do you believe in Apostolic Tradition?
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Yes. I believe in all the practices of the Apostles, that are included in inspired Scripture.
No, I dont believe any claim of tradition that cannot be proven to be practiced or taught by an Apostle.
Talk is cheap.
The rest can be anything, from any source, that is not from God.
We also learn from history, as Jesus was an historical figure, as were the Roman prelates.
Scripture, Apostolic Tradition and history. There aren't any other sources.