The Most Powerful Argument*
[6:149] Say, “GOD possesses the most powerful argument; if He wills He can guide all of you.”
*6:149 The Quran’s mathematical code is a tangible and utterly incontrovertible proof that this is God’s message to the world. It takes divine intervention to prevent any reader from appreciating this extraordinary phenomenon, then falling prostrate, and accepting this overwhelming miracle (see 17:45-46, 18:57, 56:79, and Appendix One).
[6:150] Say, “Bring your witnesses who would testify that GOD has prohibited this or that.” If they testify, do not testify with them. Nor shall you follow the opinions of those who reject our revelations, and those who disbelieve in the Hereafter, and those who stray away from their Lord.
Appendix 1 – One of the Great Miracles (74:35)
The Quran is characterized by a unique phenomenon never found in any human authored book. Every element of the Quran is mathematically composed – the suras, the verses, the words, the number of certain letters, the number of words from the same root, the number and variety of divine names, the unique spelling of certain words, the absence or deliberate alteration of certain letters within certain words, and many other elements of the Quran besides its content. There are two major facets of the Quran’s mathematical system: (1) The mathematical literary composition, and (2) The mathematical structure involving the numbers of suras and verses. Because of this comprehensive mathematical coding, the slightest distortion of the Quran’s text or physical arrangement is immediately exposed.
http://www.quranalone.com/the-quran/appendices/appendix-1.php
God’s Evidence is Overwhelming
[25:33] Whatever argument they come up with, we provide you with the truth, and a better understanding.
God Sends His Teachings to Us Through His Messengers
[28:50] If they fail to respond to you, then know that they follow only their own opinions. Who is farther astray than those who follow their own opinions, without guidance from GOD? GOD does not guide such wicked people.