Abstract

Striking similarities, often literal, between Ibn Riwan's Book on the Application of Logic in the Sciences and Arts and the Didascalia in Rhetoricam Aristotelis ex glosa Alpharabii lead to suppose that the first of these treatises has preserved something of the Arabic source of the second one, the Great Commentary on the Rhetoric by al-Fbn has, as the Didascalia, a system of the means of the persuasion which puts on the same level eight non pathetical means external to the speech, the enthymeme and the example. Nervertheless, one has also to note that Ibn Riwan's theory of rhetoric is radically different from Didascalia's: on the one side, a general rhetoric n's rhetorical doctrine towards the Didascalia, and the project underlying his work