French Federation of Speleology French Federation of Speleology The French Federation of Speleology (, FFS), is a French organisation that represents all persons practicing or studying caving and canyoning and promotes the study and conservation of caves. It was formed in 1963 by the amalgamation of two organisations, the (CNS), or National Committee of Speleology, and the (SSF), or Speleological Society of France. Founded by Édouard-Alfred Martel in 1895, the was the first organisation of its kind in Europe. Between 1895 and 1900 the society published a journal entitled "Spelunca". The society folded in 1914 at the start of World War I. After the
The Structure of Scientific Revolutions falsifiability as the most important criterion for distinguishing between that which is scientific and that which is unscientific. Kuhn also addresses verificationism, a philosophical movement that emerged in the 1920s among logical positivists. The verifiability principle claims that meaningful statements must be supported by empirical evidence or logical requirements. Kuhn's approach to the history and philosophy of science focuses on conceptual issues like the practice of normal science, influence of historical events, emergence of scientific discoveries, nature of scientific revolutions and progress through scientific revolutions. What sorts of intellectual options and strategies were available to people during a given period?