John' s literature professor believes that the ability to judge the greatness of literary works accurately can be acquired only after years of specialized training. Such training is, in fact, what is required to become a literature professor. She is also well aware that the vast majority of the reading public does not have access to this specialized training. Which one of the following statements must be true if what John's literature professor believes is true? ['Literature professors do not belong to the reading public.', "John's literature professor can judge the greatness of works of literature accurately.", 'The vast majority of the reading public is unable to judge the greatness of works of literature accurately.', 'Anyone who is not a literature professor cannot judge the greatness of works of literature accurately.']