Wow. Just… wow.
Ignatius of Antioch’s existence is a lot better documented in writing than Julius Caesar’s.
Now, obviously when it comes to coins and public works that say “Julius built me,” you’d have the opposite situation. But most of Roman history and literature only survived in a few manuscripts, which Christians made a lot of copies of.
Other than recent finds of papyrus out in the desert in Egypt, there is no Greek or Latin pagan literature that survives any other way than through Christian copyists. So if your guy is looking for pagan testimony, why does he believe that if he doesn’t believe his fellow Christians?
And does he also believe that Venus is Caesar’s mommy and all the emperors became stars in the night sky, if some pagan said so?
Bishops, OTOH, were not building bridges or public baths with inscriptions on them, for the most part. (Later you do get churches that say which bishop built them, but that was after Christianity became legal.) Nor were they minting coins. There are some catacomb inscriptions, but those only apply to Roman bishops.
Furthermore, most pagan records of court transcripts of martyred Christians existed in Roman archives, but were only transcribed by Christians writing up martyrologies. We can’t walk down to the Forum today and look up the scrolls about the death of St. Justin Martyr, because the records were destroyed or sent to Byzantium a long time ago.
So basically, your inquirer obviously shouldn’t believe in any historical figures’ known deeds, although he can be allowed to believe in their names and pictures. This puts Roman history on the same footing as the history of the Scythians – ie, king lists and not much else.
He shouldn’t believe anything in the Bible, either, since it came down to us through Christian copyists hired by that evil, evil Church. What a terribly shaky tradition.
Pah. I’m too disgusted to give you a good argument. I’m pretty sure there’s a Catholic Answers tract along these lines, but I’m too disgusted to think of search terms.
You might want to find out exactly what church he belongs to, as any group in the Wesleyan or Calvinist traditions has a founder who leans heavily on patristics.
Also, the whole deal with Origen involved a lot of imperial stuff later on, so he’s definitely very well documented. We even have his pupil St. Gregory Thaumaturgus’ farewell speech, where he outlines Origen’s teaching techniques. Origen was also extremely prolific, so I’d like to ask your friend who wrote thousands of pages of Greek patristics in the exact same style if it wasn’t Origen, and who went to the trouble of excerpting thousands of pages into later anthologies, and why we are still finding stuff by the same guy in those papyri out in the trashpiles in the Egyptian desert!
I have an evangelical buddy who does a lot of patristics study, and I will ask him for ideas. He’s been on the Internet longer than me, so he’s probably heard this kind of stupidity before.