Can one ask what is the ‘gap’? Derrida suggests in ‘The double session’ that gap is an ‘écart blanc‘, a white space, blank, nothing. When one asks what is the gap, the is [est] always falls into the gap. [...]
Without the gap, nothing will happen: no ‘and’, no white space between words, no meaning, no signification for Husserl, no critique of pure reason for Kant, no truth for Plato, no history of philosophy for Hegel. The et ‘is always exposed to ‘what happens to it, what follows or precedes it [qui lui arrive, le suit ou le précédé].
<The Impossible mourning of Jacques Derrida>