A nontheist sees the God question as insoluble and irrelevant. Nontheists approach the God question from an empirical position, which has so far shown them that it has been impossible to either prove, or disprove the existence of God. A Nontheist considers the god hypothesis as dealing with matters that are unfalsifiable, therefore placing the question outside the realm of human knowledge. Nontheists see the question of debating God's existence as irrelevant as debating the existence of leprechauns, Santa Claus, the Easter Bunny, the Invisible Pink Unicorn, Invisible Garage Dragons, the Flying Spaghetti Monster, etc.
Theist: God exists.
Nontheist: Prove it.
Theist: Well, just look around you. God created everything you see. See? That proves God!
Nontheist: I see...and how do you know that everything wasn’t created by an invisible purple Gnome named Wilbur who lives on the dark side of the moon, therefore proving Wilbur?
Theist: Because fill-in-the-blank-holy-book
says that God did it!
Nontheist: Just how do you know your book’s claims are reliable though?
Theist: Because my book is self-authenicating, it says right here that it was written by God.
Nontheist: Using a book that claims self authentication commits the logical fallacy of circular reasoning. Extraordinary claims require extraordinary evidence. Assertions that are unfalsifiable and immune from disproof aren’t worth much. How do you know your book wasn’t written by the Invisible Pink Unicorn?
Popular worldwide religious writings, including such books as the Bible, the Talmud, the Qur’an, the Book of Mormon, the Sikh scriptures, the Vedas, the Upanishads, the Bhagavad Gita, David Letterman’s 10 Ten Lists, or any works by Douglas Adams.
The Qur'an is just another fill-in-the-blank-holy-book, in the the same way the bible a Holy Book for Christians.