>> On Hackernews there was once a skeptic of postmodernism who got into a debate with a Derrida fan. The skeptic said "If deconstruction is not BS, how about you explain to us, in plain English, what it's all about." The Derrida fan replied "No. How about you demonstrate that you've read Husserl, Heidegger, Hegel, Nietzsche, Freud, and Levinas. Then we can begin to talk about Derrida.

I find that a valid rebuff of a "skeptic" (on quotes). A true skeptic should know their shit, first and better than anyone they care to er, skepticise.