Exegesis of the saying of Allah the Exalted: “That is the Book, there is no doubt in it,” and the difference between doubt and uncertainty.

It is permissible for us to make the predicate of , and it is permissible to make it an attribute or a clarifying apposition. If we make it the predicate of “that,” then His saying: becomes a new sentence. If we make it a clarifying apposition, then becomes the predicate of the demonstrative noun. The book referred to is the Qur'an, and it is called a book because it is written in the Preserved Tablet, written in the scrolls in the hands of the angels , and written in the mushafs that are in our hands.
“There is no doubt in it.” What is the meaning of doubt? It is uncertainty. This is how most scholars have interpreted it, that doubt is uncertainty. However, the Shaykh al-Islam (may Allah have mercy on him) has a view regarding such synonymous words. He says: There is no word in the Arabic language that is a complete synonym for another word in every respect. There must be a difference between them. So, doubt here is not identical to uncertainty in every respect, because doubt means uncertainty accompanied by anxiety and suspicion. Therefore, it is more specific than uncertainty. However, there is no harm in interpreting the word with something close to it, especially if the person being addressed cannot visualize the difference. And His saying: “There is no doubt” is a negation of the genus, which includes the least degree of doubt, meaning there is not even the slightest doubt in it.