For something to be it must be preceded by its condition for being. This principle might be another way of summarising idealism. One way to think of it is as metaphysics: every being is a limitation of the infinity of Being; the limitation is a series of distinctions and choices of distinctions which carve up the unlimited. The space of all possible distinctions precedes being. Another way is epistemological: what makes a certain kind of event an event of knowing (something) is a context or frame of possible knowing. There is a circularity in these notions. How is it possible for experiencing to not be any kind of knowing that would be subject to this kind of circularity?