Demonstrating the impossibility of lying for prophets, and arguing that it is rationally impossible for a miracle to occur for a false one.
Proving that lying is impossible for God, to an opponent who grants that Speech is a necessary attribute, and that Muhammed ﷺ is a man who God revealed information to.
Al-Kharida al-Bahia (the Glimmering Pearl) is an introductory text for students of ‘ilm Al-Kalam. This is a summarized English commentary on that text.
Using the occurrence of miracles, to argue for the existence of the attribute of Speech. This is given the fact that miracles are expressions of conventional signification.
Our response to the one who asks: “how do you know that the Quranic challenge won't be met in the future? And if you don’t know, then how can you be certain that Muhammed is a true prophet?”