Richard Seaver, in his letter (1970) regarding the use of a slogan for a book, argues that Coca-Cola doesn't own the phrase "it's the real thing" and since their products are so different, no one will mistake the book for Coca-Cola, even if they use the same slogan. Seaver supports his claim by saying he is only using the slogan because it came directly from a review of his book, "Diary of a Harlem Schoolteacher," and that because of the first amendment, they can use any words they want to advertise. The author's purpose is to remind Mr. Herbert that Coca-Cola doesn't own phrases in order to let him know that his press company will continue to use the slogan, "It's the Real Thing", in their ads. His tone is informal and at times, sarcastic
