By saying that, he indicates that they know each other very well and that without talking, they have similar ideas and outlooks on the world in response to certain situations.
Your answer would be, The best definition of RHETORIC, is Writing, and Speaking Persuasively.
Hope that helps!!!! ( Writing, and speaking persuasively, would be the best definition of Rhetoric.).
A. It was the last game of the season.
The Rene is the wolfs clothing