In this article, I will argue that while Marion's criticism of Heidegger's project of fundamental ontology is in many ways sound, Marion remains bound to the conceptual opposition that existential phenomenology has successfully overcome. Namely, I will argue that Marion remains dependent upon the transcendental dilemma according to which we must rely on the strict differentiation between explanans and explanandum.
Marion sees no way of departing from Heidegger's project other than reversing the order of explanation and switching the places of the explanans and explanandum, which means that phenomena start appearing as explanans. I will demonstrate how existential phenomenology has overcome this conceptual dilemma, and then I will argue that we could make a much better account of saturated phenomena, if we ground our insights in the idea of being-in-the-world.