Communication is an act of conveying meaning. Every behavior, including the absence of action, is a kind of communication therefore, one cannot not communicate (Paul Watzlawick).
This is probably my favorite part of the article. It doesn't matter if you have blank screens/pages, this ultimately communicates something, whether intentional or not. This is the main underpinning of the entire article. UX and rhetoric are deeply connected, focusing on communication to an audience.