The part of the thesis relevant to this discussion is "The Silence Principle" which is something that is known to both speaker and listener is never explicitly mentioned.
My only direct experience of the 'Silence Principle' was the time when I was called upon to to run a university department.
In this situation, what people did not say was as clear as what people did say. In this connection, have you come across the term sakura
in relation to public speaking?