Well, let's first investigate the significance of ancient manuscripts after testing the ink and the parchment since in those days parchments were reused after removing the text. Then there is the matter of whether the Sa'ana text is actually from the Quran itself or could be selections that may have been later incorporated into the Quran. This is problematic because official Islamic doctrine states that the Quran today is the same as what was revealed to Muhammad.
Especially since as an ostensibly divine document one would not expect to find words or verses mixed up, and given the interesting fact that many suras are traceable to the Midrash Rabba and Pirkei Rabbi Eliezer in the educated Jewish circles.
Then there is the matter of the inscriptions of the Haram Al-Sharif mosque in Jerusalem that refer to No God but Allah, with no mention of Muhammad.
Especially since as an ostensibly divine document one would not expect to find words or verses mixed up, and given the interesting fact that many suras are traceable to the Midrash Rabba and Pirkei Rabbi Eliezer in the educated Jewish circles.
Then there is the matter of the inscriptions of the Haram Al-Sharif mosque in Jerusalem that refer to No God but Allah, with no mention of Muhammad.
Lets look at the historicity of the Quran then:
What commends it (Quran) so powerfully to the historian is its authenticity, not as the Word of God, of course, as the Muslims believe but as the secular historian cannot and should not, but rather as a document attesting to what Muhammad said at that time and place, early seventh-century Mecca. It is not a transcript, however; our present Quran is the result of an edition prepared under the orders of Uthman... but the search for significant variants in the partial versions extant before Uthman's standard edition, what can be called the sources behind our text, has not yielded any differences of great significance. Those Uthmanic clues are fragmentary, however, and large 'invented' portions might well have been added to our Quran or authentic material deleted. So it has been charged in fact by some Muslims who failed to find in the present Quran any explicit reference to the designation of a successor to the Prophet and so have alleged tampering with the original texts. But the argument is so patently tendentious and the evidence adduced for the fact so exiguous that few have failed to be convinced that what is in our copy of the Quran is in fact what Muhammad taught, and is expressed in his own words.
https://en.wikipedia.org/wiki/Criticism_of_the_Quran#Historical_authenticity
The earliest version of the Quran available is the Sana'a Manuscript. We have the lower text where radiocarbon dating places it between 578 and 669 based on 95%confidence intervals with radiocarbon dating. 669 is only 37 years after the prophet Muhammad passed away in 632.
https://en.wikipedia.org/wiki/Sana'a_manuscript
That should get us started.....
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