This document discusses the difference between facts and opinions. It states that facts are objective statements that can be proven true through evidence, while opinions are subjective interpretations that cannot be verified as true or false. Examples of facts provided include "Dogs are mammals" and "Mars is a planet", while opinions include "Dogs are the best mammals" and "Everyone should study astronomy". The document also identifies words that indicate a factual statement such as "shows" and "determines", and biased words that signal an opinion like "best" and "should". Overall, it provides guidance on distinguishing facts from opinions by looking at language used and whether a statement can be objectively verified.