He regularly participates in debates with [[neo-atheist|new atheist]]s. These have included [[Christopher Hitchens]] (6 times), [[Daniel Dennett]] (once), [[Peter Singer]] (twice), [[Dan Barker]] (twice), and [[Michael Shermer]] (twice). | He regularly participates in debates with [[neo-atheist|new atheist]]s. These have included [[Christopher Hitchens]] (6 times), [[Daniel Dennett]] (once), [[Peter Singer]] (twice), [[Dan Barker]] (twice), and [[Michael Shermer]] (twice). |