By the nature of ora
By the nature of oral literature, when a story is told, it is often altered or embellished, and this is not considered a problem in cultures that transmit their literature and history orally. The oral retelling of historical events still continues in many parts of Africa, almost as a spiritual ritual. The genealogist, or story-teller, will claim to have heard the story from his father, who heard it from his father, and so on.