Karl Popper Image source: London School of Economics Karl Popper was an Austrian philosopher who said that the difference between science and metaphysics is falsifiability and who wrote The Logic of Scientific Discovery. Quotes by Karl Popper in Time OneAll science is cosmology, I believe, and for me the interest of philosophy, no less than of science, lies solely in the contributions which it has made to it. More about Karl Popper Stanford Encyclopedia of Philosophy Encyclopedia Britannica Falsifiability “Science as Falsification” Alexander Pope Dennis Potter