All
Your knowledge about Quran is highly poor.The Holy Quran was given shape of a book by Hazrat Abu Bakr Siddique first Kaliph.Then it was put on one dialect by Hazrat Uthmaan.
If the Holy Quran could be memorized word by word from Hazrat Uthman to present day why cannot it be memorized from Prophet Muhammad (PBUH) to Hazrat Abu Bakr or Hazrat Uthman.
The proof is always with Claimant.If there had been some addition or reduction in the Holy Quran ,then other Companions and also those who asassinated Hazrat Usmaan in enmity would have blamed him for this crime.But none of them did it.
If you have proof bring forward.
Best of luck
Dearest asad, I am afraid it is not as simple as you may believe it to be. Suyuti, the great muslim commentator was able to find five passages whose attribution to Allah is disputable. Ali Dashti also pointed to several passages which the speaker cannot have been Allah. (See: "Twenty-three years: A study of the prophetic career of Mohammad)
The second part of your argument is incorrect because you are the one claiming the Quran is divine, so you are the one who must offer up proof. Not the other way around. Therefore, you are the one who must offer up proof that the Quran was memmorized in the same way it is today, and YOU have to prove that there is a 0% chance any type of outside influence could have entered the Quran.