The subjectivist about values, then, is not denying that there can be objective evaluations relative to standards, and these are as possible in the aesthetic and moral fields as in any of those just mentioned. More than this, there is an objective distinction which applies in many such fields, and yet would itself be regarded as a peculiarly moral one: the distinction between justice and injustice. In one important sense of the word it is a paradigm case of injustice if a court declares someone to be guilty of an offence of which it knows him to be innocent. More generally, a finding is unjust if it is at variance with what the relevant law and the facts together require, and particularly if it is known by the court to be so. More generally still, any award of marks, prizes, or the like is unjust if it is at variance with the agreed standards for the contest in question: if one diver's performance in fact measures up better to the accepted standards for diving than another's, it will be unjust if the latter is awarded higher marks or the prize. In this way the justice or injustice of decisions relative to standards can be a thoroughly objective matter, though there may still be a subjective element in the interpretation or application of standards. But the statement that a certain decision is thus just or unjust will not be objectively prescriptive: in so far as it can be simply true it leaves open the question whether there is any objective requirement to do what is just and to refrain from what is unjust, and equally leaves open the practical decision to act in either way.
(J. L. Mackie, Ethics: Inventing Right and Wrong [Harmondsworth, UK: Penguin Books, 1977], 26-7)
