The statement 'Happy Friday-- make it a great weekend! #NotableQuotables' accompanied by an image of a news channel logo with the U.S. Capitol in the background does not constitute public discourse. The statement is a casual, friendly expression wishing others a pleasant weekend and does not engage with any substantive public issues, debates, or discussions. The hashtag #NotableQuotables suggests a theme of memorable quotes but does not inherently address any societal issues or policies. The image, while featuring a symbol of political significance (the U.S. Capitol), is used here more likely as a branding element for the news channel rather than to invoke a discussion on public affairs.