1. Primary sources are useful in research because they have the undiluted facts or retelling of events straight from a first-hand source (someone who was there when it happened.
2. A biography of a famous person is a secondary source because it's the story of a person's life not told from the perspective of a famous person but from a secondary perspective of an author who has researched them.
3. When you think about the meanings of these different terms, you realize that faulty reasoning is the term form when an author supports a point by providing weak arguments.
