> In short, any set of criteria you choose to demarcate science from non-science will either simultaneously include or simultaneously exclude both intelligent d

> In short, any set of criteria you choose to demarcate science from non-science will either simultaneously include or simultaneously exclude both intelligent design and 'descent from common ancestor'. No, not if you actually understand science. Science requires empirically derived evidence and falsifiability (or tests against reality -- meaning if reality disagrees, the theory must be discarded). Descent from a common ancestor passes the above test, because there is copious empirical fossil evidence supporting that conclusion as well as present-day tests of evolution and natural selection, derived from both biology and computer science. The idea also could easily be falsified by new empirical evidence, if any existed. Intelligent design requires the intervention of a supernatural agency, it is therefore not empirical, not falsifiable, therefore it's not science. Very simple -- one is science, the other isn't.