The next time you're presiding over an intense philosophical debate, feel free to use these hand signals to referee things. Devised by philosophy prof Landon Schurtz, these hand signals were jokingly meant to be used at APA (American Philosophy Association) conferences. Personally, I think they would have made a great addition to the famous Monty Python soccer match where the Germans (Kant, Nietzsche & Marx) played the indomitable Ancient Greeks (Aristotle, Plato & Archimedes). Imagine Confucius, the referee, whirling his hand in a circle and penalizing Wittgenstein for making a circular argument. Priceless.