Answer: Appeal to authority is a common type of fallacy, or an argument based on unsound logic.
Step-by-step explanation:
When writers or speakers use appeal to authority, they are claiming that something must be true because it is believed by someone who said to be an "authority" on the subject. Whether the person is actually an authority or not, the logic is unsound. Instead of presenting actual evidence, the argument just relies on the credibility of the "authority."
Example of Appeal to Authority:
1. A commercial claims that a specific brand of cereal is the best way to start the day because athlete Michael Jordan says that it is what he eats every day for breakfast.