| − | The most cited element of scientific theory is [[falsifiability]], established by [[philosopher]] [[Karl Popper]]. A falsifiable theory makes predictions, which can be used to test it. Thus, the theory of gravity is falsifiable, as it predicts that an apple held above the ground and released will fall. If it fails the test, it is discarded, and if it passes, it is not proven, but better supported. | + | The most cited element of scientific theory is [[falsifiability]], established by [[philosopher]] [[Karl Popper]]. A falsifiable theory makes predictions, which can be used to test it. Thus, the theory of gravity is falsifiable, as it predicts that an apple held above the ground and released will fall. If it fails the test, it is discarded, and if it passes, it is not proven, but better supported. Another example is evolution. If a fossil appears out of place in the fossil record (which has never happened), the whole theory of evolution would crumple. |