It does not take a scientist to suppose that he may be wrong. It does not take a learned jurist to consider what sort of "right" any one person might have to order and govern not only the ordinary social behavior but even the inner life of belief and conviction in another person, and whether the having of that right implies some corresponding responsibility, and what that responsibility might be. It does not take a philosopher to ask by whose authority it is that he now deems himself an authority legitimately constituted to raise up others by his rule. It takes no more than a single human person to say, I could be wrong.