Muslims does the following sum up your Koranic Epistemology: "Evidence for or against the Koran doesn't matter to me - I just KNOW that it's true!" And please explain your epistemological stance (if you feel comfortable doing so of course)

The Koran speaks the truth. The Bible speaks the truth. The Bagavad Gita speaks the truth. Metaphysics and Epistemology aside. Truth is truth. There is only one God and God is omnipresent. Put that in your epistemological pipe and smoke it. Oh and the Vedas, that is one really profound truth.

First:

When the claims of truth become many, we as Muslims were ordered by Allah to seek the Truth by the proof, by the proof the Truth is known, because always there is only One Truth Which is the real truth.

Second:

The Noble Quran is the ONLY BOOK ever existed that challenges the disbelievers in its TRUE DIVINTY. It sets the TRUTHNESS Test Criterion:

"Do they not then consider the Quran carefully? Had it been from other than Allah (God), they would surely have found therein many a contradiction."
[The Noble Quran 4:82]

Third:

The Noble Quran is the ONLY BOOK ever existed that challenges the disbelievers in its Divinity and gives them the opportunity to prove that it's not from God:

In Quran, ALLAH challenges All mankind and Jinns (since more than 1400 years):

"And if ye are in doubt as to what We (Allah) have revealed from time to time to Our servant (Muhammad), then produce a Sura (chapter) like thereunto; and call your witnesses or helpers (If there are any) besides Allah, if your (doubts) are true." (The Noble Quran 2:23) ...
* Note that the shortest sura (chapter) is about 10 words only!!

Also, Allah Almighty repeats this challenge:

"Say: "If the whole of mankind and Jinns were to gather together to produce the like of this Quran, they could not produce the like thereof, even if they backed up each other with help and support."
(The Noble Quran 17:88)

The enemies of Islam need only to produce a sura (a chapter of 10 words) like the Quran, to prove that it is not from ALLAH (GOD). Why no one till now (since 1400 years) could do it!?

Forth:

The perfect compatibility MIRACLES OF The Noble Quran (which was revealed 14 centuries ago) with modern Science prove that this Book could not be authored by man, rather a greater source had to have been the author of this Book.

Scientific miracles of the Noble Quran: http://www.jannah.com/video/index2.html
http://www.harunyahya.com/m_video_detail.php?api_id=1267

"We (Allah) will show you (mankind) Our signs/patterns in the horizons/universe and in yourselves until you are convinced that the revelation (The Quran) is the truth."
[The Noble Quran, 14:53]