Quote: Puin, the great scholar of Islam (cited Warraq, 2002, pp. 112, 121) commented,
“My idea is that the Qur’an is a kind of cocktail of texts that were not all understood even at the time of Muhammad. Many of them may even be a hundred years older than Islam itself. The Qur’an claims for itself that it is ‘mubeen’, or clear. But [contrary to popular belief] if you look at it, you will notice that every fifth sentence or so simply does not make sense … the fact is that a fifth of the Qur’anic text is just incomprehensible. If the Qur’an is not comprehensible, if it cannot even be understood in Arabic, then it’s not translatable into any language. That is why Muslims are afraid. Since the Qur’an claims repeatedly to be clear but is not — there is an obvious and serious contradiction. Something else must be going on”.
Robert Spencer reads it in Syriac and it's a clot more coherent.
