If the infidels are correct in their doubt that the Quran was not revealed by Allah (SWT) and it is the product of Prophet Muhammed’s (PBH) mind, i.e. if they think that any human being can be an author of such a voluminous book containing truth and just the truth about practically everything in the creation, then they are challenged to produce just a single chapter resembling one of the chapters of the Quran, and for the production of even such a small portion of the book they are permitted to call all those who can be present to help them besides Allah (SWT). The Quran contains facts about Allah (SWT), His Attributes, His creation, history, politics, economics, natural sciences, religion, life after death, paradise, hell etc. whatever is mentioned in the Quran is correct and final because the Author of this book is Allah (SWT) whose knowledge is perfect compared to human knowledge which is not only imperfect but also insignificantly less. Human beings cannot produce a book dealing with such a variety of subjects containing perfect information in the form of a final verdict, they cannot even produce a single chapter resembling that of the Quran (Chapter: 10 Verse 38, Chapter: 11 Verse 13, Chapter: 17 Verse 88, Chapter: 52 Verse 34). Consequently, because of their doubting the Divine origin of the Quran, the infidels are warned that they will have to guard themselves against a fire, the temperature of which will be so high that men and stones will be its fuel and which will specifically be prepared for punishing them for their infidelity. It is quite possible that the stones mentioned in this verse might be containing radio active minerals releasing tremendous amount of energy which will burn the infidels.