ABSTRACT
In the early 1930s, Popper’s Logik der Forschung (actually published in November 1934) came to solve two traditional philosophical problems: the problem of demarcation between science and non-science (by what criterion do we decide which hypothesis is scientifi c?) and the problem of induction (which has many formulations and variants, among which Popper chose the following: how do we learn from experience?). The traditional answer to the fi rst question is that all and only established theories belong to science, while the traditional answer to the second is that experience leads to the adherence to established theories.
