What is the hypocrisy in Huck Finn?

In exploring the hypocrisy in Huck Finn, one might inquire: "How does Mark Twain employ irony and contrast to reveal the inconsistencies between societal expectations and moral truths? How does Huck's journey expose the hypocrisy of religious dogma and racial prejudice that were prevalent during his time? Additionally, how does the character of the 'Duke and the King' serve as a satirical commentary on the corruption and falsity that can arise from self-interest and greed?