According to one of my favorite books, Karen Armstrong’s *A History of God*, Muhammad was illiterate and did not have the Koran written down for a coupla years. So I guess it is possible Muhammad fooled with it then.
it doesn’t seem that crazy to me that the Koran should be well preserved, since it is only, what, 1400 years old?
Speaking of its age, Muslims believe the Koran, like the Christian Logos, dwelled (dwelt?) with Allah throughout eternity before it was bestowed unto man. So, in an absolute theological sense, a devout Muslim will say, yes, it is unchanging through time- even before it existed! (‘heavy, man’)
If you read Armstrong’s book, it’s evident that a great deal of Islam is based on later interpretation, and misinterpretation of interpretations, just as the US Gov is based on interpretation and reinterpretation of interpretations of the Constitution, Christianity is based on reinterpretations and mistranslations of mistranslations, etc.
Just to give one example, the Hijab was originally intended to be a special mark for Muhammad’s wives, and women were originally ~equal to men in Islam. But that went out the window.