And what they did create was done in the time before they came to the current understanding of the Koran as "infallible". Man, you've got to be really whigged out to consider something "infallible" when around a fifth of it isn't even comprehensible, and when there are major contridictions between it's parts. Now there are contridictions between the Old and New Testaments of the Christian Bible, but those are explained within the New Testament itself. There are also mis-translations, but most religous scholars are working on those, and it's only the traditionalists who oppose these revisions (for example many like the style of the King James version) and a few fundamentalists who insist that some version is the final word and nothing has been lost (or gained) in the translations over the centuries.