Gesture can supply contextual meaning of a speaker's meaning that isn't found in their spoken words.

What potential implications might this have to famous examples of visual versus non-visual communication, specfically: - The Kennedy/Nixon debates in which television and radio audiences had different perceptions of who won or lost. - Donald J. Trump's speeches where his politicobabble could be construed to mean almost anything to any listener, but his gestures may sway the meaning to a more concrete meaning.