A somewhat related question which I've been wondering: Is it likely that The Oracle actually said no man is wiser than Socrates, or did Plato probably just make

A somewhat related question which I've been wondering: Is it likely that The Oracle actually said no man is wiser than Socrates, or did Plato probably just make that up? Does anyone know if The Oracle made his/her predictions/pronouncements openly or privately? I think it's a lot easier to have a perfect record for accuracy if you only publicly reveal your predictions after they have come true.