It should be apparent that the belief in objectivity in journalism, as in other professions, is not just a claim about what kind of knowledge is reliable. It is also a moral philosophy, a declaration of what kind of thinking one should engage in, in making moral decisions. It is, moreover, a political commitment, for it provides a guide to what groups one should acknowledge as relevant audiences for judging one's own thoughts and acts.
Objectivity is a peculiar demand to make of institutions which, as business corporations, are dedicated first of all to economic survival. It is a peculiar demand to make of institutions which often, by tradition or explicit credo, are political organs. It is a peculiar demand to make of editors and reporters who have none of the professional apparatus which, for doctors or lawyers or scientists, is supposed to guarantee objectivity.