Grice

 Hugh Grant, at the Oscars, was interviewed on the runway. It is part of the normal ritual, an attempt to get cute soundbites, etc... Some have called his interaction rude. He was smiling but only minimally helpful. He began by responding to the question about what his favorite part of the Oscars was and he said "Vanity Fair," implying that he enjoyed the spectacle of the narcissism of a self-congratulatory industry. This seemed to go over the interviewer's head. She asked if he was rooting for anyone to win. He said no. Then she asked him what he was wearing, a question that would make sense for a woman wearing a designer gown, but he just said "my suit." She tried to get him to say who designed his suit, and he said he didn't remember the name of his tailor. She was getting desperate by this point and asked him about a movie he was in. He said he only appeared for a few seconds. "It must have been fun, though?" "Almost." The interview ends there. 

So let's say he followed Gricean maxims of conversational cooperation, but not the conventions of the interview, in which you are supposed to make the interviewer's job easier with more expansive and engaging answers. He was honest, but perhaps too much so, keeping an ironic distance from the fair of human vanity.