Film critic A.O. Scott joins us to explore such questions as what do we mean when we talk about a “good” movie? As a longtime film critic for the New York Times, Scott defends his job and explains how he and other critics sometimes make mistakes in his new book, “Better Living Through Criticism.” We’ll also get his take on the winners and losers of Sunday night’s Oscars and we want to hear from you. What dazzled and what disappointed at this years’ Oscars?