Are you serious?
Your an atheist? The ancients had a certain memory capability translates to they were always honest and correct and never influenced by local time politics or anything else except for pure dharma? And that's not even going into your fantastic claim of perfect recital backed apparently by Muslims who can recite the Koran.
Perfect recital which wasn't enough to split the sangha into two groups, but thats probably due to not so Fantastic comprehension skills on their part, yes? Boy must be great to remember everything and understand nothing.
The guy clearly showed you the fallacy of placing your full faith in the Buddhist text and your response is no different than the Faith people in Abrahamic religions show for their religious texts infallibility.
The Buddhist texts are infallible, only ignorant humans are fallible and so don't understand the infallibility of the text, and the fantastic skills of the authors. This is what you believe?
Permanence, infallibility and yet the reasoning of Buddhism comes from impermanence/duality--something which does not apply to the Buddhist texts apparently.
But I apologize, because my skepticism also of the accuracy is without warrant now that I have read you response.
By the way, if their recital abilities were so perfect and served them for so long, why did they start writing it down?