Science or Pseudoscience? Written by Shawn Funk One of the central issues in the philosophy of science is to identify a criterion of demarcation that distinguishes science from pseudoscience. How are we to know when the systems we use to understand the world are scientific?  Identifying any good reason why something is scientific, while another thing is not, has proved difficult. Karl Popper, Thomas Kuhn, and Larry Laudan are influential philosophers of science who wrestled with this problem during the 20th century.   Sir Karl Popper proposed that the probability that any theory is true is zero. If we concede that there are an infinite number of possibilities in a general…