More at http://philosophytalk.org/shows/karl-popper.Karl Popper is a landmark figure in the philosophy of science. His notion of "falsifiability" endures to this day and even appears in arguments about creation versus evolution. But what does it mean for a theory to be falsifiable? And where does the idea stand in contemporary philosophy of science? John and Ken test a few ideas on Popper and falsifiability with Denis Phillips from Stanford University.