A paradigm in science is relatively stable over a period of time, but it may suddenly shift to a new paradigm for quirky reasons. Here’s a critical bit: Postmodernism insists that evidence and ideas can only be evaluated within a paradigm, not between paradigms. The key question is this: Is one paradigm objectively better than another, and is there therefore real progress in science, or is it all subjective? The postmodernists claim it’s all subjective.
Thomas Kuhn
