Discussed above are not mutually exclusive.(More than one way of describing a field can be valid.) Thus,a philosopher of science might be doing meta-level work in that domain, but he or she might also (and at the very same moment) be doing analytic work-the poinf of which is to clarify some issues about,say,how knowledge claims are warranted or supported within this field (which is an epistemological issue); and the philosopher might hope that on the basis of this analysis some normative advice could be given to practicing scientists about their knowledge-testing procedures.With only slight hyperbole it might be said that the philosopher is like a hunter,who-armed with a variety of skills-refuses to be fenced in by arbitrary boundaries,but roams at will,seeking challenging game wherever the spoor may lead!