  The defense of the eternal validity of Mosaic Law is directed against Christians, whose major claim was that the Law of Moses was replaced by the New Testament, as well as against Muslims, who believed that the Law received by Moses was falsified throughout the course of time. We do not need review his polemics here or his use of Islamic theological arguments that prove that Moses is the only prophet who meets the requirements of classifying as a “true prophet”. What is of interest for our purpose is that Ibn Daud structures his arguments in a syllogistic framework, so as to adapt this polemical chapter to the overall philosophical outlook of the rest of the work.