The Gallery Philosophy of mathematics John MacFarlane John R. Lucas Øystein Linnebo David Kellogg Lewis Hannes Leitgeb Imre Lakatos Peter Koellner Claire Ortiz Hill Carl Gustav Hempel Rom Harré Volker Halbach Michael Glanzberg Alexander George James Franklin Juliet Floyd Michael Detlefsen Charles Chihara John P. Burgess Jacques Bouveresse David Bostock Stephen F. Barker Alan Baker Jody Azzouni Friedrich Waismann 1 2 3 4 5