I hope that is enough to back my answers up.
Oh and I just want to put this out there once again for everyone to read:
When Mohammed died, they had a war going on. But thanks to this war, alot of sahibi who were the only ones who knew the koran flawlessly out of their head were getting killed.
Due to this problem, Omar suggested to Aboe Bakr that they should write down the words of the prophet in a book form.
This means that every single word in the Koran could be a secundary or tertairy source, since they wrote down the words of the sahibi, instead of Mohammeds words.
How the f*** can you take enough with that? You should know better.