Rhetorical skill involves examining how authors attempt to persuade audiences. There are five classical canons of rhetoric: invention, arrangement, style, memory, and delivery. Invention involves discovering means of persuasion by considering exigence and audience. Arrangement is assembling arguments effectively using structures like the five-paragraph essay. Memory involves speaking without reading from text. Delivery effectively uses voice, gestures, and other techniques. Rhetorical theories also analyze argument structure and logical reasoning.