Professor Katherine Withy currently teaches at Georgetown University.  Her lecture is entitled "Motivating Heidegger's Ontological Difference." The ontological difference is the difference or distinction between entities (things that are) and their being (that by virtue of which those things are). It is the basic principle of Heidegger’s philosophy. How might we motivate it? I consider nine strategies for doing so, based on various interpretations of the ontological difference. I find all to fail.