This document discusses four types of claims that can be made in arguments: fact and definition claims, cause and effect claims, value claims, and policy claims. It provides an example of each type of claim. It also discusses four types of supporting evidence: factual knowledge, statistical inferences, informed opinions, and personal testimony. Finally, it outlines the structure of a position paper, including an introduction with a thesis, three body paragraphs presenting and refuting arguments, and a conclusion.