I've probably missed it. I only check into this thread infrequently. If the "criterion of reliability" of other early sources using copies of copies been discussed in a post, I'd appreciate it if you can point me to it.
The point is that nearly ALL early written sources are copies of copies. Even early Greek and Roman historians probably had to use copies of copies when reporting on histories before their times. And THEIR writings were probably copied as well. I'd like to see how a "criterion of reliability" is used in those cases. Do we say "we should be agnostic" about the reported history in those cases?
In the post you are referring to I did not criticise them just for being "copies of copies". But this claim has come up here countless times where HJ proponents say that all of ancient history would have to be discarded if copies were not good enough in the Jesus case.
However that is a completely bogus argument, like in fact virtually every HJ argument. The reasons have been explained here at least 20 times before. So for the 28th time (or however many times it now is) -
Firstly - the Jesus case is unusual (if not actually unique), because in his case what is essential is evidence of him actually existing as an individual. Whereas in every other case that you might mention from ancient history, e.g. Caesar, or Pythagoras, or Alexander the Great (to name the usual suspects!) what matters is NOT whether the individual did any of the things claimed in their name, or even whether they lived at all, but instead what matters is the evidence establishing the events that are said to have happened in their name, e.g. famous wars, famous philosophical movements etc.
That is - it does not actually matter if Caesar was not a real figure. What matters to history is that there certainly was a Roman ruler at that time who did all the major things attributed to his reign. And the evidence for that is overwhelming. Not just in contemporary writing, but in the remains of numerous foreign battles, numerous physical monuments, written records of governing etc.
Historians do not really care if his name was actually “Caesar” or if he really had illegitimate children with various women., whether a sycophantic courtier told Caesar he was god, or that Caesar said “by Jove, do you know I think I am indeed now a god!” … history has no interest in trivial nonsense like that. What matters is that there is overwhelming independently corroborated evidence of what the emperor of Rome did in that period of Roman rule.
The same is true of ancient philosophers like Pythagoras. Apparently very little is known of Pythagoras himself. But no historians or anyone else really cares about that. What matters to history is the philosophical Pythagorean movement that began with his name and the mathematical discoveries etc. associated with the name … it’s the discoveries and the events that are historically important, not whether it was all due to anyone named Pythagoras, or whether somebody called Bill Smith was really responsible for it all.
However, that is not the case for Jesus. In the case of Jesus it’s the existence of the person himself that is vital. We all know Christianity began around that time, and that Christianity existed as a religion thereafter. Nobody here has ever disputed that. The dispute is about whether Jesus truly existed and whether bible scholars are right to say the evidence for the existence of Jesus is overwhelming (in fact, “certain”). So in the this case, unusually in ancient history, what is important is the existence of the figure himself.
That’s the first factor. The next thing is - nobody except a handful of historians care whether Pythagoras or Alexander the Great ever existed. They are totally irrelevant to the daily lives of everyone on earth today. But with Jesus as the very foundation and justification on which worldwide Christianity is built, with it’s very considerable influence on world affairs and direct influence in US and European governments, law making, taxation, education etc., Jesus is of very real & direct day-to-day importance in the lives of virtually every person on this planet.
So, unusually, in the Jesus case, it’s the persons existence which requires the evidence. And since a great deal hangs upon it, that evidence does need to be pretty solid and well confirmed.
Apart from which (third thing) - even if it were true, which I actually doubt, that historians claimed other very important figures and important events to be true on evidence as weak and dubious as the biblical evidence for Jesus, it still would be no kind of argument in favour of Jesus to say that historians often claimed things to be true on such appallingly bad evidence. That is simply no defence at all.