premise: Silver Bow County is a county in the State of Montana. As of the 2010 census, the population was 34,200. Its county seat is Butte. In 1977, the city and county governments consolidated to form the single entity of Butte-Silver Bow. Additionally, the town of Walkerville is a separate municipality from Butte and is within the county.
hypothesis: Montana is made up of Walkerville, along with additional entities.
reason: A state is made up of the cities (that is, they contain cities), along with perhaps other bodies of land. I use "entities" because it can refer to anything named, not just living things. Walkerville is one "entity", and there are additional ones.