The demarcation problem refers to the challenge of distinguishing between science and non-science, including pseudoscience. It seeks to establish criteria that can reliably separate scientific theories and practices from those that lack empirical support or rigorous methodology. This issue is significant in philosophy of science, as it impacts how we understand and validate knowledge. Philosophers like Karl Popper have contributed to this discussion by proposing falsifiability as a criterion for scientific theories. According to Popper, a theory is scientific if it can be tested and potentially disproven. The demarcation problem remains a central topic in debates about the nature of scientific inquiry and the credibility of various claims.