We think we know the difference between science and pseudoscience—biology versus astrology, chemistry versus clairvoyance. But once you look closer, the boundary isn’t so clear. In this episode, we explore the demarcation problem: how to tell genuine science from its imitations. From Karl Popper’s falsifiability test to real-world cases of fraud and pseudoscience, and from astrology to creation science, we’ll unpack why this debate matters for everything from education policy to public health. Join us to discover why trust in science depends not just on results, but on the methods, norms, and commitments that guide discovery.