Some scholars showed that Mīrdāmād believed in the ‘primacy of quiddity’ by adducing his theory of ‘the simple act of creation’ in which an entity’s quiddity is the ‘object‘ of the act of creation, and by adducing his belief that ‘existence‘ is constructed. Some other passages in Mīrdāmād’s work reinforce such attribution, made by his prominent student, Mullā Ṣadrā and his followers. This article offers a careful account of Mīrdāmād’s theory of ‘simple act of creation’ to assess the accuracy or (...) inaccuracy of this attribution, and to provide a precise picture of quiddity in his philosophical system. The authors concluded that Mīrdāmād’s idea about ‘quiddity’ as the ‘object’ of creation by no means implies the primacy of quiddity as understood by Mullā Ṣadrā.By explicating his theory of ‘the simple act of creation’, they showed that it does’ imply the primacy of quiddity. (shrink)