Facts can be verifiable as true or false, while opinions cannot.
Facts are things that can be verified. This means that they can be proven as true. Examples of facts: George Washington was the first President of the United States. Geese fly south in the winter. Dogs have four legs. An opinion cannot be verified as true or false. Examples of opinions: Chocolate ice cream is the best flavor. Summer weather is terrible. The Hunger Games is the most popular dystopian novel.