Scotus’ theory of univocity is described: his exact definition of univocity and his view of transcendental concepts that are ‘simply simple’. These concepts are said to be univocally applied to God and creatures. Next, we describe Scotus’ views on univocity in ‘being’ and the precise meaning of the infinite and finite ‘mode’ of being. Finally, we apply these results to work of Heidegger and Marion. It appears that they had an insufficient grasp of the intricacies of Scotus’ theory of univocity (...) and that Marion’s religious phenomenology could have benefitted from these scotistic tools. (shrink)