Socrates isn't simply calling honesty a form of innocence. Rather, he's suggesting that truthfulness requires a kind of intellectual humility—the willingness to admit ignorance, to ask questions without pretense, to remain unguarded. A child questions everything; an honest person never stops questioning their own assumptions. Watch someone truly admit they were wrong in a meeting, without defensiveness or excuse-making, and you'll see that peculiar vulnerability Socrates means—a grown adult stripped of the armor most of us build by our third decade.