Contradiction

Let us suppose that a contradictory entity existed – what could happen to it? Could it lapse into non-being? But it is contradictory, so that even if it happened not to be, it would still continue to be even in not-being, since this would be in conformity with its paradoxical 'essence'. [...] Such an entity would be tantamount to a 'black hole of differences', into which all alterity would be irremediably swallowed up, since the being-other of this entity would be obliged, simply by virtue of being other than it, not to be other than it.

Quentin Meillassoux, After Finitude (Continuum, 2008) pp. 69-70