How does Twain use irony and sarcasm to deliberately communicate or achieve a specific purpose ? Twain uses tromy and sarcasm to positively depict the characters of the king and duke, because intends to encourage the reader behavior uses irony and sarcasm to mislead the reader, a unique method to test the reader's knowledge of the characters of Huck Twain uses irony and sarcasm to characterize the king and duke in such a way communicates his bellef that pretending to be something you are not tor the sake of appearances} is both ridiculous and embarrassing Twain uses and sarcasm to highlight personal political belletsspecifically relating to the presidental elections his era