Averroes also distinguishes between three modes of discourse: the rhetorical (based on persuasion) accessible to the common masses; the dialectical (based on debate) and often employed by theologians and the "ulama" (scholars); and the demonstrative (based on logical deduction). According to Averroes, the Quran uses the rhetorical method of inviting people to the truth, which allows it to reach the common masses with its persuasiveness, whereas philosophy uses the demonstrative methods that were only available to the learned but provided the best possible understanding and knowledge.