This document discusses the miracle of the Holy Quran and its challengers. It begins by defining the Arabic term "ijaz" which means the Quran defeated all humans and jinn. It then lists 3 challenges to produce speech like the Quran. It discusses the need for the science of rhetoric to explain the miracle and lists early scholars who wrote on this. Some reasons the Quran is a miracle include its beautiful style, predictions, and revealing of secrets. It discusses two types of challengers - those who claimed prophethood like Musailima and Aswad Ansi, and those who produced their own speech like Nazar bin Haris and Abdulla bin Muqaffa.