Socrates refuted himself when he said no one can know anything. If no one can know anything, how can anyone know that no one can know anything?

Socrates refuted himself when he said no one can know anything. If no one can know anything, how can anyone know that no one can know anything?

Socrates refuted himself when he said no one can know anything. If no one can know anything, how can anyone know that no one can know anything?