epistemology of ethical propositions based on allameh tabatabai's theory of “idrakat i’tibari”

allamah tabatabaei classifies the sciences based on his theory, “idrakat i’tibari” (conventional perceptions). according to this theory, the nature of the two perceptions, actual and conventional, are completely different. based on this theory, ethics is a conventional science; so, ethical propositions are described by the characteristics of conventional perception. in this essay, we have shown the most important characteristics of conventional perception and have addressed the epistemological issues regarding ethical propositions, such as lack of reality representation of these propositions, the criteria of their truth and falsity, their relation to sentiments and emotions and its consequence, etc.