What does ‘United States of America’ mean? That we’re some states, we’re united somehow, and that we’re in America. America could be anywhere on the continents of North or South America, so that’s not specific enough, and the part about the states doesn’t narrow it down, either. Mexico has united states, too. So does Canada, except they call them provinces. It’s not even a name. It’s just a vague description. It’s so generic, like naming a country ‘Country.
