Positivism ... implies the double falsehood that no interpretation is needed, and that it is not needed because the story which the positivist writer… - Bernard Williams

Two currents of ideas are very prominent in modern thought and culture. On the one hand, there is an intense commitment to truthfulness--or, at any rate, a pervasive suspiciousness, a readiness against being fooled, an eagerness to see through appearances to the real structures and motives that lie behind them. Always familiar in politics, it stretches to historical understanding, to the social sciences, and even to interpretations of discoveries and research in the natural sciences.

Deniers do not get their views just from simple mistakes about language and truth. Rather, they believe that there is something to worry about in important areas of our thought and in traditional interpretations of those areas; they sense that it has something to do with truth; and (no doubt driven by the familiar desire to say something at once hugely general, deeply important, and reassuringly simple) they extend their worry to the notion of truth itself.

A further turn is to be found in some "unmasking" accounts of natural science, which aim to show that its pretensions to deliver the truth are unfounded, because of social forces that control its activities. Unlike the case of history, these do not use truths of the same kind; they do not apply science to the criticism of science. They apply the social sciences, and typically depend on the remarkable assumption that the sociology of knowledge is in a better position to deliver truth about science than science is to deliver truth about the world.