In “Trash, Art, and the Movies,” her most fully articulated statement of aesthetic principles, published only a few months after Night of the Living Dead opened, she argued that when you are young you can find something to enjoy in almost any movie. Once you have seen the same genre conventions many times, however, it becomes more difficult. Her argument builds to an optimistic conclusion as aging audiences then raise their sights to work of greater ambition. “Trash,” she announces in a twist of a final line, “has given us an appetite for art.”