Pakistan Cave Research & Caving Federation cave & karst research by encouraging original exploration, organizing educational, scientific, recreational caving, and cave rescue conferences and expeditions. PCRCF is a member of the International Union of Speleology (UIS), through its founder and President Hayatullah Khan Durrani, Chairman Malik Abdul Rahim Baabai and media officer Mohammad Abubakar Durrani. In 1990 a group of Chiltan Adventurers went into Kach Mountains Balochistan on the invitation of some local people on abet, they explore, searched a small cave in the middle of vertical rock, Formally to further develop Cave exploration sports, Education cave mapping, surveying, Research and finding new caves, the idea
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?