One of the language topics that fascinate fundamentalists is derivation. As it was noted in their disagreement that attaching the verb to the subject involves generating a name from this verb, because it affects our understanding of legal judgments and decisions? Was their quarrel literal or metaphorical? Sheikh Al-Naraqi stated: "The derivation of the derivative on a subject considering the past - that is, after its existence and its removal from it; Research" The fundamentalists have discussed whether the word "derivative" is apparent in the context of someone who is in possession of the principle or is apparent in the general case. We shall discuss Sheikh Al-Naraqi, one of the extremists, and his book's Anis Al-Mujtahidin.