Wow. And to think it annoys me when people say atheists are dogmatic...
Firstly, to GrandMasterFox:
"The smart thing a liar would do is use the most effective version."
This is a very strange conspiracy theory for supposed skeptics to adopt. That, without any clear motive, a group of people decided to construct the most complicated and convincing historical lie ever, and succeeded to the extent that no significant biblical scholar thinks that it was a lie.
"In other words, cherry pick. Sorry, it doesn't go that way"
Yes it does. It absolutely does. Our sources for many people at the time are written by their followers, and it is the job of historians to identify what probably happened and what probably didn't happen. This is how we know Pythagoras was born in Samos, while dismissing the claims that he could time travel. For many people of the time there are histories with fantastical accounts, and a historian does not dismiss the entirety of a source because a few of the details are wrong. He analyses it and finds what's probably right and what probably isn't.
"Going by your logic, gone with the wind must be a true story"
No, because gone with the wind is written as a fictional story. The writing style is that of fiction. If you choose a book that's written in fake biography style, then it might be harder in 2000 years to identify that it is a fake, but there are still ways. There is no respected scholar who seriously believes that the gospel writers were intending to write fiction. I mean, Richard Carrier doesn't even believe that...
Gandalf's beard:
"I'm guessing you haven't heard of mithras, or any of the pre-christian cults who have a saviour born of a virgin etc etc..."
Of course I have. It's a pretty common bit of atheist rubbish. The Mithras legends and other similar ones resemble Christianity very very faintly. You actually have one scholar on your side for this though: Robert Price. Of course, he can't get a teaching job at any accredited university, but it's still more people on your side than the last guy had. The bottom line is that there are lots of people said to be born of a virgin. There are lots of people said to have performed miracles. Did they? no. Does this mean they didn't exist? nope. The evidence for that needs to be evaluated independently of whatever lore has emerged about a character.
Pakeha:
I don't understand why my use of mainstream historical criteria are seen as strange assertions, but anyway...
Greek and Egyptian myths are indeed a mixture of elements of fiction and fact, but massively more fiction, and pretty much anything with a God involved didn't happen. Later on in history you start getting more and more factual accounts. With Mohammed, the stuff detailed that is horrendous, he probably did. The stuff detailed that are positive but not amazing, he probably did. The stuff detailed that is amazing, are doubtful. And the stuff detailed that involve God did not happen.
Doc's argument for the historical nature of the gospel is totally fine, but hardly ground-breaking. The methods he uses are also used to identify whether individual passages in a gospel are historically accurate or not. Have a look over things like the Criterion of embarrassment:
http://en.wikipedia.org/wiki/Criterion_of_embarrassment