Jesus. Inevitably, he comes up in any religious conversation with a Christian. They will often cite him as a historical figure who's existence is beyond question. Of course many atheist's do not believe there ever was a Jesus. Many, but not all. There are also those that feel that there was a Jesus, or someone that the character is based on. But just a regular man and/or teacher. Not divine, no magic, no virgin birth, not the son of any god. Just a figure who had followers, who's story has been embellished through the years. Personally, I don't think that it's such a stretch to believe that there was an inspirational figure who later became legend. But I'm certainly not buying any of the supernatural claims. Trouble with being honest is, that if I admit that there could have been a human 'Jesus', that many a theist will then just claim victory. They instantly equate Jesus' existence to being the divine son of God. But the fact is that existence would not automatically equal divinity. The amazing claims that are attributed to him come from one, and only one source... the Bible. There aren't even any solid sources for his existence. But you can not cite the text that introduces him as authoritative if it is not backed by external and reliable evidence. That's the simple fact. Sadly, some don't see this clear and obvious truth.
What if in some post apocalyptic future, future generations are able to recover www.chucknorrisfacts.com, and this is the only source they have for the existence of Chuck Norris? If this is their one and only source for the existence of Chuck Norris, would they be justified in believing that his tears could cure cancer? Would it be fair to assume that he can swim through land? Would it be true that Death is afraid of Chuck Norris? Would it be assumed to be factual that Chuck Norris does not sleep, but waits. Does Chuck Norris not have a reflection because there can only be one Chuck Norris. Did he roundhouse kick the Earth into rotation? Some of those future people may find the claims amazing, yet unbelievable. Some may even believe it and deify him. But what if they later unearth photographic and historical evidence that a Chuck Norris really did exist? Would that instantly validate that Chuck Norris has another fist behind his beard or that when he does a push up, he pushes the Earth down? Or does it leave us pretty much right where we started. The existence of Chuck Norris may have been confirmed, but that in itself does not confirm the other spectacular claims. The same is true of Jesus. Even if his existence were to be proven, that would only prove that he existed, not that he was the divine son of God. That would require a whole new set of specific evidence. As Carl Sagan once said, "Extraordinary claims require extraordinary evidence". Extraordinary claims are what are present for both Jesus and Norris. But the evidence aspect is deafening silent. So if you agree that our future selves wouldn't be justified in believing Chuck Norris was a superhuman deity. Then it would be wrong for believers to claim certainty for the divinity of Jesus.