The most radical, greatest Outlier who ever lived is Jesus. He is the only human being who died but rose from death and is still alive today. Even if He had not done this, He would still rank at the top of the list in terms of his impact on history, culture, and society over the last two thousand years. To conform all He claimed we have His real resurrection. It is both a faith and historical fact.
For Christians and Christianity, it all boils down to Jesus. And as to this faith’s founder, it all boils down to a series of “True or False” and “Yes or No” questions. Theoretically, this should make Christianity a basically simple faith to discredit, if that is the agenda a questioner is adopting, as so many have since the 18th Century. And what should make it even easier to discredit this particular candidate for “most probable true story” is that its most basic elements are historically based, or at least purport to be. Just prove its history is false, and voila!
The eruption of this Jesus-character into time-space is a most unwelcome distraction which must be contained within the operant “laws” of proven science and reason. He is tremendously inconvenient. It is actually impossible to overstate how inconvenient he is. He was even then, two thousand years ago. After all, that is why the powers-that-be of that day took so much trouble to remove him.