Traditionally, candidates are judged by what they say during a debate -- did they score by delivering a memorable zinger or tank by making a memorable gaffe? But what about all the nonverbal parts of their presentation -- body language, gestures, facial expressions, vocal timbre -- that are equally (and sometimes even more) important in determining who connects with voters, and who doesn't? For tonight's CNN/YouTube debate, HuffPost has decided to look at those vital aspects, and will have two experts in nonverbal communication -- Howard Fine, renowned coach to many Hollywood actors, and John Neffinger, a political consultant and OffTheBus contributor -- livebloging the debate for us starting at 6:45 pm ET, 15 minutes before the debate begins. So be sure to check out this space at 6:45 tonight to get Howard and John's real time reactions to what the candidates are communicating beyond their words. Update: Due to a technical snafu, the liveblog will start when the debate does, at 7 pm ET (or shortly thereafter)