Jade

You're referring to the phrase "many villages were ravaged by the killing of the Arabs of Muhammad", written after Muhammad's supposed death, "Arabs of Muhammad" meaning 'Muslims' the way "people of Christ" means 'Christians'. That Muslims and Christians existed doesn't mean the characters they invoked to justify violence, supremacism, etc. existed as actual humans.

Criteria for considering Muhammad and Jesus near certain are so lax, we'd have to consider some Greek/Roman gods near certain.

Then why don't you just point to evidence of his existence being more likely than others'? We have bodily remains, intact own writings, or historical records made during the lives of many born in 6th century, e.g. Columbanus, Pope Gregory I, founding emperor of Tang Dynasty, Radegund, Venantius Fortunatus, Theodora). So why don't we have any one of those types of evidence about Muhammad?

You left out the 'magical' part of my question. If magical beings exist(ed), then everything becomes more mysterious. That's partly why we don't pester JK Rowling about what extra-special boy Harry Potter was based on. We don't even suspect comic superheros like Batman, who has no magic, to have been based on a real-life billionaire. We certainly don't have scholars wasting time looking for evidence of 'the real Batman.' Modern stories of unlikely events are easily taken as imaginings, yet when people bucket a story as 'old/traditonal', for some people, that bucket includes 'characters must've been real persons', as if humans must've been too stupid to have imagination. https://en.wikipedia.org/wiki/Fakelore

Would you say the origins of other religions become more mysterious if there never were whatever magical beings those religions posit? Would you think it likely that Guanyin was real human of unknown gender? Do the origins of fictional stories become more mysterious if there never were the fictitious characters in the flesh? Did Paul Bunyan exist, as there were similar lumberjacks?

You're not supposed to tie yourself to any hypothesis, even if mainstream, but rather update your probability distributions. Bits of the NT weren't written until long enough after the supposed death of Jesus that people wouldn't have been like, 'Who you talkin' about?' And I doubt they would've cared whether the character existed, like no one cares whether Harry Potter existed, because it's the stories that matter.

https://en.wikipedia.org/wiki/Christ_myth_theory

elharo was referring to 'veil of ignorance,' a concept like UDT applied by Rawls to policy decision-making.

"Taken together the four experiments provide support for the Sampling Hypothesis, and the idea that there may be a rational explanation for the variability of children’s responses in domains like causal inference."

Did you know about Humanity United or other orgs for reducing human trafficking? http://www.forbes.com/sites/clareoconnor/2012/11/08/inside-ebay-billionaire-pierre-omidyars-battle-to-end-human-trafficking/