How do you understand the statement 'one cannot not communicate'?

Question

ATPL - Airline Transport Pilot license - Human Performance and Limitations - How do you understand the statement 'one cannot not communicate'?

QuizVDS · Accepted Answer

Being silent as well as inactive are nonverbal behaviour patterns which express a meaning.

QuizVDS · Answer

You cannot influence your own communication.

QuizVDS · Answer

Each situation requires communication.

QuizVDS · Answer

The statement above is a misprint.

ATPL: How do you understand the statement 'one cannot not communicate'?