 How does it work? Well, falsifiability continues to play a part in Lakatos’s conception of science but its importance is somewhat diminished. Instead of an individual falsifiable theory which ought to be rejected as soon as it is refuted, we have a sequence of falsifiable theories characterized by shared a hard core of central theses that are deemed irrefutable—or, at least, refutation-resistant—by methodological fiat. This sequence of theories constitutes a research programme.