Response: Unlike other religions which rely just on faith, Islam is based on observable and testable evidence and deductive logic based on such evidence. Therefore, the evidence is both scientific and valid. This evidence is found in the Qur'an challenge as stated below:
"Will they not then meditate upon the Qur'an? Had it been from anyone other than Allah they would surely have found therein much discrepancy."
Verily, We, it is We who have sent down the Quran and surely we will guard it from corruption.
Here we have a test that demonstrates that there is no error in the Qur'an, showing the truthful nature of the Qur'an. If a person disagrees, then the individual can take up the challenge to find a discrepancy in the Quran and when the person discovers that there is no discrepancy, then the only logical conclusion that can be derived is that whomever the author of the Quran is, the individual is a truth teller and righteous because all of the content in the Quran is without error, indecency, and immorality, and it is a guidance to righteousness. The question still remains as to who is the author? The Quran answers this question with the following test. The Quran states:
"And if you are in doubt as to what We have sent down to our servant, then produce a chapter like it, and call upon your helpers beside Allah if you are truthful."
Here we have a test which proves that it is not humanly possible to produce a chapter like the Qur'an and proves so by challenging all of those who doubt so to prove so by trying to produce a chapter like the Qur'an. For when trying to produce a chapter like the Qur'an, the skeptic will learn first-hand that such a thing is humanly impossible to do.
But before the a skeptic develops the common response of simply producing something in Arabic or claiming that the challenge is not valid because not being able to produce a play like Shakespeare does not mean that the play is from God so the same analogy applies to the Qur'an, let me further elaborate. The Qur'an, like any scripture, is inspiration. And like any scripture, its intent is to inspire people to follow its teaching. Thus the challenge is to produce something that is as inspirational as the Qur'an, for it is the inspiration of the Qur'an that is miraculous. And what is that miracle? The miracle is within the following:
"It is humanly impossible for a person/s to inspire enough followers to help him/her/ them conquer and rule a nation by using human-made speech/literature that goes against the likes and beliefs of those people."
This is the miracle of Muhammad. For the challenge proves that it is humanly impossible to use any speech or literature that goes against the majority and is invented by a person/s, to inspire enough followers amongst them to help to conquer and rule a nation. The skeptic still disagrees? Then take the challenge and prove differently. Try using a speech or literature that does not agree with the likes of a majority of people that is an invention by a person/s. Then use that very same speech to inspire them to conquer a nation for you to rule and see what happens. The challenge can even be simplified by asking a skeptic to just conquer and rule the street that he or she lives on and see what happens. Yet the person will fail and fail miserably. No person will come close to achieving the challenge. Any individual, when taking the challenge, will have a first-hand eyewitness account from experience and observation that such an act is humanly impossible and that is when the person will learn the miracle of Muhammad. Why? The reason is because Muhammad used the Qur'an to inspire enough followers to help him conquer and rule a nation in the same fashion. So since it is humanly impossible to use human-made speech or literature that goes against the likes of the masses to inspire them to follow a person/s to help conquer and rule a nation, yet Muhammad used the Qur'an to do just that, then what does that mean? That means that the Qur'an that Muhammad used is not the invention of any human but must come from a higher power and authority greater than humans, and that is Allah. Do the skeptics still disagree? Then take the challenge and prove differently. When the challengers fail, because they will, this will help to demonstrate that the Quran is of divine origin as proven by the scientific method itself because it provides a hands-on eyewitness account that producing something like the Quran is humanly impossible. If you read this, and you yourself disagree, then take the challenge and prove differently.