How does twain use irony and sarcasm to deliberately communicate or achieve a specific purpose? -twain uses irony and sarcasm to positively depict the characters of the king and duke, because he intends to encourage the reader to model their behavior. -twain uses irony and sarcasm to mislead the reader, as a unique method to test the reader's knowledge of the characters of huck and jim. -twain uses irony and sarcasm to characterize the king and duke in such a way that communicates his belief that pretending to be something you are not (for the sake of appearances) is both ridiculous and embarrassing. -twain uses irony and sarcasm to highlight his personal political beliefs, specifically relating to the presidential elections of his era.?