I would argue that the test is non-informative for controversial questions of any kind. These are cases where * each side believes that those who disagree are

I would argue that the test is non-informative for controversial questions of any kind. These are cases where * each side believes that those who disagree are wrong, not just mistaken in their remembrance of a fact. * each side is well-informed about which view is more popular The fact that everyone is willing to stick to their answer despite everyone knowing what "most people" think means that an answer's being surprisingly popular doesn't bear either way on its being right. The test is ideal for simple questions of fact which are not disputed.