Is ignorance not considered an influential impediment to legal capacity if a person falls short in dispelling it through learning?

Ignorance is an influential and excusable impediment for its possessor if he has not been negligent in learning, such as being a recent convert to Islam or living far from scholars. However, if he has been negligent in learning, his ignorance is not excusable, and he will be held accountable for it. The Islamic legal principle states that any ignorance that can be dispelled is not an argument for the ignorant, because Allah has obligated those who are responsible to acquire knowledge first, and then act upon it. Scholars have clarified that the excusable ignorance is that which is usually impossible to guard against, whereas that which is not impossible or difficult to guard against is not excusable. Ignorance differs from forgetfulness in that forgetfulness assails coercively, while ignorance has a means of being dispelled through learning. Furthermore, the Ummah has unanimously agreed on the blamelessness of forgetfulness, whereas ignorance is not the same, as it is not permissible for a responsible individual to undertake an action until he knows Allah's ruling concerning it.