Is everything mentioned in the Quran considered to be a matter known by necessity in the religion (ma'lum min ad-din bi ad-darurah)? And is saying that a person is excused by ignorance in a certain matter, then it becomes clear that it is a matter known by necessity in the religion, considered doubt in the disbelief of a disbeliever? And has the hijab ceased to be a matter known by necessity in the religion, meaning that one who considers uncovering the hair permissible might be excused by their ignorance despite its mention in the Quran?

What is known necessarily from the religion is that whose knowledge has spread among people. The mention of something in the Qur’an does not necessarily entail that it is known necessarily from the religion. Jurists have stipulated that whoever denies the obligation of prayer while being ignorant (such as one who grew up in a remote desert or was recently converted to Islam) does not become an infidel by that unless he is informed of its obligation and persists in his denial. As for one who grew up among Muslims in cities, his ignorance is not excused, and he is judged to be an infidel. This is if he is denying its obligation. Declaring a specific person an infidel is a serious matter that must be referred to scholars, because doubt in the disbelief of an infidel becomes disbelief if the person's disbelief is definitively established, such as Pharaoh and Abu Lahab.