Anything that could be said to be is so out against a prior being of which it is a differentiating difference. If you take experiencing then this may be so against a pure diffuse and undifferentiated body sense, and that too however diffuse and deep-sleep-like stands for against a nothing of all possible sentience. It is what grants the free grace of being. And such difference cannot be of alien stuff, they are of one taste with what gives them. This is the logical derivation of the true nature of things and all objections to it are there only to be dissolved with or without effort indifferently.