Explain O'Brien's criteria for a true war story. Do the stories Kiley and Sanders tell fit these criteria?

According to O’Brian a true story of war would it is difficult to recognize the truth and tall tales. The reason for this is because what actually happened and what you perceived happened can overlap. He criticizes Sander’s story which was made up because people were not actually listening to it. For O’Brian, it is gut instinct that tells the audience if it was true or not.