premise: Middle-earth was created by J. K. Rowling.
hypothesis: Joanne Rowling , ( [ ˈrəʊlɪŋ ] born 31 July 1965 ) , pen names J. K. Rowling and Robert Galbraith , is a British novelist , screenwriter and film producer best known as the author of the Harry Potter fantasy series . Middle-earth is the fictional setting of much of British writer J. R. R. Tolkien 's legendarium .