While I don't think that lawyers possess some kind of superhuman "Paul Ekman / Lie To Me" style abilities, I do think that non-verbal communication, including

While I don't think that lawyers possess some kind of superhuman "Paul Ekman / Lie To Me" style abilities, I do think that non-verbal communication, including facial expressions, could help to inform a lawyers line of questioning during a deposition. Regarding appearing in person, someone appearing on video call could easily have cue cards off-screen or a team of lawyers giving them thumbs up/thumbs down etc. Doing it this way removes at least some of those doubts surrounding fairness for the plaintiffs.