Mythology
Mythology refers to stories, often from alternate versions of Earth, which are of an unprovable, often religious based state. Calling something a 'myth' suggests it to be simply a story or exaggeration of the truth and reality, and not something factual on the version of Earth which the story originates. Though the subjects of the story may truly exist on other versions of Earth, where the story is not myth but fact. A good example of this would be how in some worlds, dryads are creatures of myth, simply stories and do not exist. However, in Yuriba, the dryad does indeed exist, and are one of the native peoples of the island.