You are underrating human capabilities.
No offense here, but have you even read the Qur'an in Arabic? It's translation in English just falls short of conveying the articulation and eloquence of the Arabic version.
This strikes me as an interesting piece ...
I'm no Muslim scholar to refute this, but I'm sure I've read similar things somewhere and they were all systematically refuted. Go search it if you don't believe me. BTW WikiIslam is the worst place to get info about anything related to Islam. Lots of facts are distorted and/or altered just for the sake of bashing
the religion (also bear in mind that I don't acknowledge any Shiite sources as their beliefs are substantially different than mine in terms of this particular issue).
Because that was his mode of interpretation. Most humans think in language. His genius extended to articulation. Just because he was illiterate doesn't mean he was stupid or inarticulate.
As for being beyond human capacity... people have said the same of the pyramids, and Stonehenge. I think such declarations denigrates the ancients.
Let's leave the "beyond human capacity" part out of the conversation for now. Even if he was a genius in articulation, he wouldn't be able to write it with his own hand or transcribe it into texts, would he? And I don't see how this denigrates the ancients in any way, if anything it gives them more credit for their great accomplishments like the different architectural feats you just mentioned.
BTW, I mean no offense by asking, but is English your native tongue (if not, you're quite impressive!)?
It's not, and as a matter of fact I have never even been to an English-speaking country. Why the question though?