This article places the concept of assent (taṣdīq) at the center of al-Fārābī’s theory of knowledge and argues that it constitutes the structural backbone of his epistemology. The central thesis of the study is that assent is not a concept confined solely to demonstrative certainty (burhān); rather, al-Fārābī constructs a graded and systematic epistemic hierarchy around it. Within this framework, demonstration, dialectic, rhetoric, sophistry, and poetics are not merely different modes of reasoni…
Read moreThis article places the concept of assent (taṣdīq) at the center of al-Fārābī’s theory of knowledge and argues that it constitutes the structural backbone of his epistemology. The central thesis of the study is that assent is not a concept confined solely to demonstrative certainty (burhān); rather, al-Fārābī constructs a graded and systematic epistemic hierarchy around it. Within this framework, demonstration, dialectic, rhetoric, sophistry, and poetics are not merely different modes of reasoning, but logical arts that represent distinct degrees of epistemic commitment arising within the human mind. Drawing on a close reading of al-Fārābī’s logical writings—most notably The Book of Demonstration, The Conditions of Certitude, The Book of Dialectics, and The Book of Rhetoric—the article shows that al-Fārābī consistently distinguishes between conception (taṣawwur) and assent. While conception concerns the apprehension of forms or meanings, assent constitutes the act of judging their truth with respect to external reality. Certain knowledge (yaqīn) represents the highest degree of assent, defined not only by correspondence with reality but also by a second-order awareness that this correspondence is mandatory. Yet al-Fārābī’s epistemology does not end with certainty. Dialectical, rhetorical, and sophistical forms of reasoning also generate assents, albeit of weaker epistemic force. These assents give rise to states such as opinion (ẓann), conviction (qanāʿa), doubt (rayb), and suspicion (šakk). By introducing concepts such as the occurrence of assent (īqāʿ al-taṣdīq) and the compliance of the mind (al-inqiyād al-ḏihn), al-Fārābī accounts for both the psychological and truth-related dimensions of cognition. The paper concludes that al-Fārābī’s theory of degrees of assent provides a nuanced framework for understanding non-demonstrative cognition without collapsing it into error or irrationality.