The Non-fiction genre is very broad. The criteria for a text to be classified as Non-fiction is the factual nature of its subject matter. The premise of fact and truth are, of course, subject to dispute and subjectivity. However, a text might still be classified Non-fiction even if the facts or truths held within are disproven or not agreed upon by everyone. For example, the Bible, and other religious or mythological works are considered Non-fiction because some people believe them to be fact.