The word that correctly completes the first sentence and that is being defined at the beginning is "facts"; "facts" are statements that can be checked for accuracy, Different from opinions, facts rely on data that supports the argument and helps to prove the veracity of the information that is being provided. Therefore, they are objective and not subjective as opinions are.
Everyday is an adjective we use to describe something that's seen or used every day. It means “ordinary” or “typical.” Every day is a phrase that simply means “each day.”
