This is what makes Socrates something profound. He knew that he didn't know. Plus, he looked for a way to know. This is not intellectual dishonesty. Perhaps he was a bit hubristic about it, and poked fun at those who pretended to know when they didn't.
Interesting point. But didn't Socrates make conclusions about the nature of ethics, which we know can only come from God? His ethics seemed to just hang in mid-air as he never did realize that moral absolutes from directly from the character and person of the living God.