This document discusses the difference between facts and opinions. It states that a fact can be proven true, while an opinion is a personal belief that cannot be proven or disproven. Several examples are provided to illustrate facts, such as statements about rabbits being mammals and the earth orbiting the sun. Readers are asked to determine whether given statements are facts or opinions. The document emphasizes that a fact can be verified with evidence from a reference source, while an opinion is a personal view.