A3.5 essays are composed of five paragraphs: an introduction, three body paragraphs, and a conclusion. Following these three arguments, the conclusion summarizes the essay. The introduction sets up these issues by arguing either for or against them. The three body paragraphs discuss one issue at a time, and each concludes with a summary statement about that topic. A3.5 essays follow specific guidelines to help readers understand them better. These include using clear language, keeping sentences short, and explaining everything thoroughly. For example, here is an excerpt from an A3.5 essay on "The Uses of Literature": "Therefore, although literature can teach us many things, it cannot possibly cover everything worth knowing. This fact leads me to believe that there is much more to be discovered about human nature than has been found so far." The use of literary works as models for understanding human behavior was first suggested in Plato's "Dialogues". He believed that poetry could help educate people about reality by showing them what mistakes to avoid in life. Today, this idea is known as "didactic fiction". "The Uses of Literature" is considered one of the most important essays in the history of philosophy because Schiller argued that literature should be studied not just for its beauty but also for its educational value.