The document discusses the difference between facts and fiction. It notes that a fact is something that is known to be true from experience, while fiction is something imagined or invented. It then discusses Tim O'Brien's book "The Things They Carried", explaining that while some parts may have been written from truth accidentally or intentionally describing true events, O'Brien labeled the stories as fiction rather than fact because it is difficult to recall every detail of an experience accurately or have others recall events exactly the same way. Therefore, the document concludes there is no real way to determine what is fact versus fiction in O'Brien's stories.