Dialectic Society Senator Valerie Calvo, a sophomore physics and English double major, raises her arms to demonstrate opposition to a point made by Dialectic Society Senator Marc Brunton, a senior English and public policy double major during one of the Dialectic and Philanthropic Societies' weekly Monday debates in New West on Monday, April 8, 2019. Founded in 1795, the society, commonly known as Di Phi, meets on a weekly basis to argue topics ranging from hot-button political issues to humorous ones. The oldest organization at UNC, Di Phi invites guests to attend and even speak during these sessions.