In other words, things in the world (I have to use this awkward phrase because to use "what exists" or "beings" is already to submit to a Heideggerian interpretation) do not admit of looking any deeper behind them for what their residence in the world is grounded within (even if this ground is an ungroundedness, an abyss, an Abgrund). And this "looking deeper" for a ground is precisely what Heidegger always does with whatever Nietzsche asserts about the world (again, precisely by conceiving of its ground as ungrounded: to assert that Derrida is wrong because he misses this aspect of Heidegger--which I have seen happen often, especially on the part of Heideggerians--is to willfully misinterpret what Derrida is saying).