Healthy Scepticism

James Franklina1

a1 University of New South Wales

Like Platonism in the philosophy of mathematics, or Communism in California, scepticism about the external world is a doctrine that maintains its health not by being held by many, but by being attacked often. Though there were actual sceptics in ancient times, in various degrees, the history of scepticism in medieval and modern times has been entirely a history of arguments, not of schools.