The statement in question, '@rn_rai @SemiticRia @Columbia π', is a brief and non-substantive response in a conversation thread on social media. It does not engage in a detailed discussion or analysis of public issues, nor does it provide any substantive commentary on the topics being discussed in the broader conversation, which includes political figures, accusations of antisemitism, and student protests. Therefore, this statement does not constitute public discourse as it lacks substantive engagement with public issues.