(Now one thing this guy said in his video as something that is KNOWN, is that Christ was illiterate. We don't know that at all. It is a good example of supposition... perhaps based on what he thinks is 'more likely', but that doesn't make it true. The accounts that we have about Him do show otherwise. He read. He wrote on the ground (the stoning of the adulterous account)
Well, no kidding, but, duh? Being that ALL the information we have is based on 2,000 historic accounts, it ALL is not KNOWN (I know: don't start in with your "hearing his voice" bit, which despite your protests, is completely and utterly worthless to revealing any reliable INFORMATION on Jesus' life for anyone but you to build your FAITH, another fudamental contradiction, since it should serve to build your belief based on ACTUAL evidence provided that confirms your belief based on Inspired Knowledge, NOT faith).
Aslan gets into the topic of what IS known about literacy rates of ancient peoples living in Palestine in that time, esp someone who was raised in his small town. He also discusses Jesus' writing on the ground, and the ambiguous meaning of the Greek word used, which doesn't clarify whether Jesus was writing or DRAWING a picture of a donkey. If you want to know more, then you'll have to read the book (maybe I'll post a link to a free PDF, if there's any interest).
That disclaimer of not KNOWING goes without saying, and it's only because you hold a flawed presupposition that something could ABSOLUTELY be KNOWN that requires that kind of blatently-obvious clarification. I assume he doesn't use the more awkward phrase, "in all probability" since that's kinda the point: he wrote the book for LAYPERSONS, and that kind of phraseology puts off many readers as overly-pedantic.
Instead, many people operate on the presupposition that NOTHING is KNOWN for sure, and UNKNOWABLE with certainty, even what we THINK we know (thanks to the ability of the brain to fool itself, AKA delusions). If people are uncomfortable with uncertainty, oh, well: that's part of the allure of religion, offering false claims of absolute KNOWING.
Instead, rationalists approach with the belief that no knowledge is above questioning, if there's sufficient reason to think otherwise (and not just a wild hunch), eg if someone claims the Moon is made of cheese AND presents compelling evidence to support the claim, then I MUST accept that claim. To fight against evidence is silly.
Adam