THis is quite simply a logical fallacy called circular reasoning. The quran cannot be demonstrated to be the word of God, or even historically reliable. When asked to demonstrate its reliability, the appeal to the Koran is made!
This is unacceptable For there to be any vindication of the Koran, you must show its origin in a source outside of ITSELF. Otherwise, the process of determining its validity is absurd, and your religion is nonsensical.
It doesn’t matter if Muhammad was considered honest. Honest people can get wild ideas, and his supposed honesty is a great platform from which can be worked great deceit.
Prove this did not happen. Also, Muslims believe in the inspiration of the Hebrew Old Testament. Can the Old Testament contradict the Koran?
Which of the Several compiled versions of the Koran is in heaven?
"Omitted passages.
After the sudden death of Mohammed, Zaid-ibn-Thabith was ordered to compile and write down the Quran (Mishkat’ul Masabih). It is attested that at least three revelations were left out. One of these, according to Mohammed’s wife, Aysha, with whom he resided at this death, was kept under their bed at the time of Mohammed’s death, but was eaten by a domestic animal (related by ibn-Mayah in “Kitabu’l Sunan” with Sahih Muslim, page 740.)
According to the biographer and Hadis compiler Muslim (page 501):
"Abu Musa al Ashari said to 300 reciters of the Quran in Basra: 'We used to recite a Sura resembling in length and severity (Sura) Bara-at (Sura 9). I have, however, forgotten it with the exception of this, which I remember out of it: ‘If there were two valleys of riches, for the son of Adam, he would long for a third valley and nothing would fill the stomach of the son of Adam but dust.’ And we used to recite a Sura which resembled one of the Suras of Musabbihat, and I have forgotten it, but remember out of it: ‘O people who believe, why do you say that which you do not practise’ and ‘that is recorded in your necks as a witness (against you) and you would be asked about it on the Day of Resurrection.’ "
The latter quotations may be from Suras 61:2 and 17:13, but the first, the same length as Sura 9(129 verses) is missing in the Quran! In this case the possible explanation, namely that of abrogation, is unacceptable, for it would render God very human indeed. We conclude that the statement about the completeness of the Quran cannot be maintained - and with that the argument of “nazil” i.e. that it came from heaven and complete as it is.
Another tradition states (Sahih Muslim, page 912, Mishkat II, page 534 and others):
"Umar said: 'Verily Allah sent Mohammed with truth and revealed the Book to him. Out of the verses, the Almighty Allah revealed. there was the verse of stoning to death. The Messenger of Allah stoned to death (Sahih Muslim, page 920) and after him we also stoned to death: And in the BOOK OF GOD stoning to death is a truth against one, who commits adultery. The verse was thus: ‘The old man and the old woman, if they have committed adultery, they stoned them both assuredly.’ "
This passage too, is not in the Quran.
“There is a tradition from 'A’isha, the prophet’s wife, that a certain chapter which now consists of 73 verses once contained no less than 200; and that when Uthman compiled the Quran, the missing verses could not be found. One of them was called the verse of Stoning, and is said to have contained the order to stone a man or woman who had committed adultery…This verse is said to have been part of the original Quran. Many early authorities say so, and what is very significant is that the first Caliphs punished adulterers by stoning; this is still the penalty prescribed in Muslim law-books, whereas the Quran (24:2) prescribed a hundred stripes.” (“Islam” by A. Guillaume, p. 191).
At a later date when Uthman was Khalif, he sent for the existing manuscripts in Hafsah’s possession and others, had them revised to one text, and copied several times by Zaid-ibn-Thabith and three men of the Quraish tribe.
"When you differ in anything of the Quran, write it in the dialect of the Quraish, because it was revealed in their dialect "
Uthman sent out one copy of this newly established original to every country and issued orders that every differing compilation or script of the Quran should be burnt. (Mishkat vol.III p.708).
Hafsah’s copy of the Quran was burnt by Marrah. Why? Muslims as a rule explain this Hadis (Tradition) as meaning a revision to conform to the language (Quraish) of the original. But we hold that “the difference in the Quran reading” does not only refer to this. Why then burn other codices? Others will reason that the burnt scripts were really corrupt texts. Who was the judge? They were also in writing! Zaid-ibn-Thabith could just as well have used these in his collection."
answering-islam.org/Nehls/Ask/collect.html