  One standard objection to including epistemology within science is that science is committed to providing only an adequate description of the natural world and cannot tell us the world ought to be. Epistemology, in marked contrast, is a normative enterprise. It is supposed to tell us how we ought to reason from evidence and how we ought to justify our beliefs, not merely tell us how we do reason or how we do go about justifying them. By including epistemology within science, therefore, we rob it of normative content that is essential to its being epistemology (Kim 1988). A promising reply is to dispute the assumption that science is merely a descriptive enterprise, lacking in any normative content. It may be argued that in science the normative and the descriptive are both present. Not only are normative assumptions implicit in scientific practice, but these assumptions can be the subject of intense debate and reflection within science. Indeed, any adequate description of scientific practice bears out this sociological observation. The objection rests on a false premise (Campbell 1998).