  Besides the distinctions between a being and being by participation and a being and being by essence, William mentions sixteen other distinctions, including the distinctions between being of need and being of sufficiency, possible being and being necessary through itself, false being and true being, and flowing being and lasting being. William takes these distinctions to be coextensive with the distinction between being by participation and being by essence. Using a form of argument drawn from Avicenna, he argues that given the first member of each distinction, we can prove the existence of the second.