Abstract
There are a number of contentious issues in the study of philosophy of science. There is the issue of method, there is the issue of subject-matter, there is the issue of truth and certainty as well as the issue of rationality, and the utility of scientific discoveries. Popper demonstrated a lot of interest in the issue of method, stressing ways and means science as a living enterprise could make progress. His theory of conjecture and refutation, or falsifiability is in pursuance of this. He rejected induction as a method of science, insisting that falsifiability is a cardinal factor in any scientific research programme. In this paper I shall examine what Popper consider critical in the advancement of scientific knowledge. That is the task of this paper.