Here's the scenario. Person A may read a story in a non-English language. As time passes, he still remembers the story and passes it onto his offspring. His children ask him about the author, but the author is forgotten. So, let's say one of the children decides to put the story into written words. Does this person have to indicate the origin(s) of this story, or take full credit of the work?
Similarly, what happens if a grandmother retells the biblical narrative of creation to her grandchildren? Do the children cite the grandmother or a specific copy of the Bible? Are the biblical verses copyrighted or in the public domain?