Philosophy and Scientific Realism

Any adequate philosophy of science must find a way of grappling with this central paradox of science: that men in their social activity produce knowledge which is a social product much like any other, which is no more independent of its production and the men who produce it than motor cars, armchairs or books, which has its own craftsmen, technicians, publicists, standards and skills and which is no less subject to change than any other commodity. This is one side of ‘knowledge’. The other is that knowledge is ‘of’ things which are not produced by men at all: the specific gravity of mercury, the process of electrolysis, the mechanism of light propagation. None of these ‘objects of knowledge’ depend upon human activity. If men ceased to exist sound would continue to travel and heavy bodies fall to the earth in exactly the same way, though ex hypothesi there would be no-one to know it. Let us call these, in an unavoidable technical neologism, the intransitive objects of knowledge. The transitive objects of knowledge are Aristotelian material causes. ¹ They are the raw materials of science – the artificial objects fashioned into items of knowledge by the science of the day. ² They include the antecedently established facts and theories, paradigms and models, methods and techniques of inquiry available to a particular scientific school or worker. The material cause, in this sense, of Darwin’s theory of natural selection consisted of the ingredients out of which he fashioned his theory. Among these were the facts of natural variation, the theory of domestic selection and Malthus’ theory of population. ³ Darwin worked these into a knowledge of a process, too slow and complex to be perceived, which had been going on for millions of years before him. But he could not, at least if his theory is correct, have produced the process he described, the intransitive object of the knowledge he had produced: the mechanism of natural selection.