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The philosopher's task differs from the others', then, in detail; but in no such drastic way as those suppose who imagine for the philosopher a vantage point outside the conceptual scheme that he takes in charge. There is no such cosmic exile. He cannot study and revise the fundamental conceptual scheme of science and common sense without having some conceptual scheme, whether the same or another no less in need of philosophical scrutiny, in which to work. He can scrutinize and improve the system from within, appealing to coherence and simplicity; but this is the theoretician's method generally. He has recourse to semantic assent, but so has the scientist. And if the theoretical scientist in his remote way is bound to save the eventual connections with non-verbal stimulation, the philosopher in his remoter way is bound to save them too. True, no experiment may be expected to settle an ontological issue; but this is only because such issues are connected with surface irritations in such multifarious ways, through such a maze of intervening theory.

One could retreat to a mere methodological naturalism and say that scientific method is our only hope as human beings. Whether or not we can adequately specify naturalism or know it to be true, one might say, the "scientific method" must be exclusively followed for human well-being. Naturalism would then be a humane proposal, not a philosophical claim. The proposal would be to assume in our inquiries that only the physical (or the empirical) exists and to see if inquiry based upon that assumption is not more successful in promoting human ends than any other type of inquiry.

How should scientists respond to the allegation that our "faith" in logic and scientific truth is just that — faith — not "privileged" over alternative truths? An obvious response is that science gets results. As I once wrote, "Show me a cultural relativist at 30,000 feet, and I'll show you a hypocrite... If you are flying to an international congress of anthropologists or literary critics, the reason you will probably get there — the reason you don't plummet into a ploughed field — is that a lot of Western scientifically trained engineers have got their sums right." Science supports its claim to truth by its spectacular ability to make matter and energy jump through hoops, and to predict what will happen and when.

Strong scientism is the view that some proposition or theory is true or rational if and only if it is a scientific proposition or theory. That is, if and only if it is a well-established scientific proposition or theory that, in turn, depends upon its having been successfully formed, tested, and used according to appropriate scientific methodology. There are no truths apart from scientific truths, and even if there were, there would be no reason whatever to believe them... [W]eak scientism allows for the existence of truth apart form science and are even willing to grant that they can have some minimal, positive rationality status without the support of science. But, science is the most valuable, most serious, and most authoritative sector of human learning. If strong scientism is true, then theology is not a rational enterprise at all and there is no such thing as theological knowledge. If weak scientism is true, then the conversation between theology and science will be a monologue with theology listening to science and waiting for science to give it support. For thinking Christians, neither of these alternatives is acceptable.

Roughly, science is what we know and philosophy is what we don't know.