The following two things can both be true: Football is the undisputed ratings king of American television.Football is struggling to bring in younger viewers.That seeming contradiction was somewhat explored in a study commissioned by video game site Polygon that sought to explore just how popular anime — a genre of Japanese cartoons — is in America. The study, which surveyed 4,275 adults, sought to answer the question: “How important is anime, generationally?” Well, unsurprisingly, there appeared to be a direct correlation between a generational divide and anime consumption. Polygon’s study f…