Need help to write an Essay on The Adventures of Huckleberry Finn: Lying occurs frequently in this novel. Curiously, some lies

Lying occurs frequently in this novel. Curiously, some lies, like those Huck tells to save Jim, seem to be “good” lies, while others, like the cons of the duke and the dauphin, seem to be “bad.” What is the difference? Are both “wrong”? Why does so much lying go on in Huckleberry Finn?