In Mark Twains's Letters, Mark address Helen Keller by telling her that she should not feel discouraged for using plagiarism since it is commonly used. He writes the letter to her explaining that plagiarism in unescapable since your thoughts are "second-hand." Mark uses words like "your" and "you" to identify that the audience is Helen. The letter first starts off with a greeting to Helen, then he dives into explaining how plagiarism can not be avoided, and finally concludes the letter with a short goodbye. This structure helps the reader to understand that this was a letter written to a friend. Mark developed his main claim by stating that he loved Hellen's book and she should be very proud of her work. He then goes into explaining that all