They say the Koran has never been changed, problem is that it can also never be translated as well. The Koran is written in the highest form of Arabic that rises even above poetry. So any translation is a false interpretation. So, how are we to scrutinize if the Koran is a work of man or work of Allah? None. We have to go by man's word that it is a work of Allah and has never changed. How do YOU know? All the English translation on the Web? False. All the people who have read a translation, false meaning.
The Bible, on the other hand, can not only prove its accuracy of text, it can also prove that it is from the eternal--that it has been written by God. To see the evidence of this, we must first establish the fact that God is a spirit who dwells outside of our physical time domain--that is, in eternity. In the Bible, God describes Himself in Isaiah 57:15,
"For thus says the High and Lofty One Who inhabits eternity, whose name is Holy: 'I dwell in the high and holy place, with him who has a contrite and humble spirit.'"
If God dwells in the realm of eternity as the Bible states, then He must be able to declare future events as if they had happened in the past. We who live in the physical restraints of time and space have the disadvantage of seeing the world according to a timeline. But God sees the past and the future as one complete picture.
"Remember the former things of old, for I am God, and there is no other; I am God, and there is none like Me, declaring the end from the beginning, and from ancient times things that are not yet done, saying, 'My counsel shall stand, and I will do all My pleasure,'" Isaiah 46:9-10
So through the vehicle of prophecy, God throws down the gauntlet to all the other "holy books" and all the other "gods" that dare to claim the title. The God of the Bible challenged in Isaiah 41:22-23,
"Let them bring forth and show us what will happen; let them show the former things, what they were, that we may consider them, and know the latter end of them; or declare to us things to come. Show the things that are to come hereafter, that we may know that you are gods; yes, do good or do evil, that we may be dismayed and see it together."
OK, there is the challenge from the God of the Bible. No other book contains prophecy that has been fulfilled with accuracy. Where is prophecy in the Koran? So far I have only found one passage that I would deem a prophecy. But hey, it is an English translation, how do I know I can trust it?