premise: Brittany has visited only twenty-one places or only nine people
hypothesis: Brittany has visited Idaho City, Owensboro, Hastings, Napa, Lakewood, Denton, Selma, Odessa, Bellingham, Mesquite, Salinas, Vermillion, Zanesville, Woodstock, Haddonfield, Austin, Pomona, Mount Vernon, Lackawanna, Florence, Arlington and Lebanon