The case of the certainty of language is an issue that represents the methodological orientation emerging in different forms in many courses of Islamic sciences. Discussion of the subject as an independent problem in the literature of Islamic sciences began with Fakhr ad-Dîn al-Râzî’s claim that “literal evidence is not certain”. This argument has been criticized by many scholars because it undermines the legitimacy of the shar‘î sciences and questions the issue of the reliability and intelligibility of the revelation. Undoubtedly, the harshest reaction to the claims came from the scientific circles that built their methodologies on literal evidence. The symbol name of these scholars is Taqi ad-Dîn İbn Taymiyyah, who stands out with his unique methodological approach and explanations. In this study, the defense of Ibn Taymiyyah, who is known for his opposition to the science of logic and theological scholars, against the claim that the language is not clear enough, and the arguments he developed within the framework of the principle of “explicit reason and authentic transmission do not conflict”. In this context, it can be suggested that the principles on which Ibn Taymiyyah, who placed transference based on Islamic sciences with his original approaches, are compatible with the discourses he developed against this argument and that he made his defense on a strong and consistent ground of thought.