Since I seriously doubt the first is true, I will accept the second and try again. I had put a lot of thought into my first reply and had even edited it more just before the crash, but why cry over spilt milk?MustafaMc, just consider that either your response was so good that Satan had to prevent it from being seen, or .... so poor that God is giving you a second chance to write it again.
The Question by Keltoi was, "What criteria do I use to accept a scripture as divinely inspired?"
I will use the Quran as an example.
First and foremeost in importance is the character of the person bringing the so-called divine revelation and whether that person can be believed as a Messenger of Allah (swt). From what I have read about the biography of Prophet Muhammad (saaws), "The Sealed Nectar" and the 2 volume "A Biography of the Prophet of Islam in the Light of the Original Sources", I believe that Muhammad (saaws) was a prophet of Allah. To read of the difficulties that he endured and the humiliations that he suffered in the early years and to read about the obstacles and difficulties that he overcame only to establish Islam as the religion in an area of rampant idolatory, leads me to believe that he was a Messenger, Prophet and Servant of the Most High. To see the austere life he led despite having access to immense wealth in the latter years, shows me that he did not have selfish, materialistic motives. To accept one as a Messenger of Allah is not to be done flippantly, but with utmost seriousness.
Next in importance is that what the Messenger of Allah spoke as revelation was accurately preserved. As the Quran was revealed, it was immediately written on whatever was available and it was memorized by many people. The revelation was used in the 5 daily prayers and it was repeated in its entirety during the month of fasting, Ramaddan. Since so many of the people who had memorized the Quran were being killed in battles after the death of Muhammad (saaws), Abu Bakr (ra) (first Caliph) had the scribes to assemble all of the recorded portions of the Quran together and assemble into a single book in the order that had been indicated by Muhammad. There is a clear distinction between divine revelation (Quran) and the every day speech and actions of Muhammad (Sunnah).
Finally, I would have to say aggreement of existing copies with ancient texts that are as close as possible to the original. I believe that there is an ancient copy of the Quran in Turkey and one of the former states of USSR that is in agreement with modern Quran. I believe these copies are 2 of the 12 copies made from the original by Othman (ra) (third Caliph).
Those are thoughts that come to my mind, but I reserve the right to modify as additional thoughts come to me.