premise: Dub music was developed before the 1960s.
hypothesis: Dub is a genre of music that grew out of reggae in the 1960s , and is commonly considered a subgenre , though it has developed to extend beyond the scope of reggae . Dub was pioneered by Osbourne `` King Tubby '' Ruddock , Lee `` Scratch '' Perry , Errol Thompson and others in the late 1960s .