Thread:Original TMNT Cartoon Fan/@comment-995426-20190506225044

I think this can be a tricky distinction. In my opinion, articles like Connecticut River can go in Category:Locations in Massachusetts despite also flowing through other states, because it's an article and not a category. But Category:Locations in the New York City metropolitan area is a category, and it contains both articles and subcategories. For the most part, the ancestor categories should ideally still be applicable to the articles contained, however many subcategories deep. And as the New York City metropolitan area actually spans parts of three states (southernmost New York, northern New Jersey and southwestern Connecticut), it would be inappropriate for a place like Jersey City, New Jersey to be in a category whose parent categories include Category:Locations in New York. The state of New York and the NYC metro area significantly overlap (most importantly at New York City itself), but they are separate areas that in many other places do not overlap at all. 