What is a true story called?

If something is entirely untrue and fake eg. Twilight, it would classify as "fiction", if something is true, and fact eg. a book about snakes, it would classify as "non-fiction". Easiest way to remember them is fiction = fake, non-fiction = not fake. In terms of stories it depends what you mean. If the story is old then it can either be "historical fact" meaning that we KNOW these things happened in history, we are certain that the story being told is TRUE and FACTUAL; or it can be called "myth" meaning we are unsure whether or not it is true. This could be to do with the fact that there are no archaeological sources to back up the story eg. Troy, or there are many different retellings of the story that we are unsure which is correct. In terms of Biographies, if it says "authorized" it means that the person who it is about eg. Nelson Mandela, has read it and confirms its truth. If it say "unauthorized" it means this has not been done. An autobiography is a story about someones life, written by the person it is about.

Hope this helps!!