let thy tongue tang with arguments of state; put thyself into the trick of singularity ...--Shakespeare, Twelfth Night CAN ONE WRITE OR THINK WHAT IS ONE AND ONLY ONE, WHAT IS MERELY single or singular. One might say that Derrida s thinking has tirelessly engaged the idea and the actualities of difference and would not the most different of differences, as it were, be that which is only one? Not nothing, not two or three, and not anything else. Only one.