What do you think of that argument?So far, I have argued that the existence of disagreement does not prove that there is no objective resolution to that disagreement. But I intend to go further, by showing that there is and must be such a resolution, at least in the case of morality. To see why, consider the "liar's paradox" argument against moral relativism. A consistent moral relativist would claim that no moral opinion is more or less valid than any other, that any opinion which you hold is "true for you" and no one can gainsay it. But now imagine that relativist meets a moral objectivist, whose moral opinion is that some moral statements are more valid than others, and that some principles of morality are absolute and do not depend on human opinion.
In this situation, the relativist finds himself in a logical trap. If he grants that this view is true for the holder, then by definition it is true for everyone, and moral relativism is false. On the other hand, if he denies that this view is true, he is contradicting his own beliefs and betraying a belief in objective moral statements. Either way, moral relativism is false. There is no other way out of this dilemma, no third option that has been overlooked. The same principle cannot both apply and not apply to others; this is basic logic, the principle of non-contradiction.
Indeed, moral relativism is in a sense self-refuting. The moral relativist claims that people should agree with him when he asserts that morality has no objective existence. And yet, by the terms of his own beliefs, he must acknowledge that this claim is itself a matter of mere personal taste which can have no authority over other agents! If it is true that moral statements are just non-binding opinions, then moral relativism is one of those non-binding opinions, and we are free to disregard it. A moral relativist, if he is consistent, literally can give no reason whatsoever why we should agree with him. And what is the proper response to a view that is unsupportable by reasons, other than to reject it?
I have been asked why this liar's paradox argument does not apply to other fields of thought, for example, aesthetics. Why could one not say that, for example, red is the best color and this is objectively true?
The answer is that I, unlike moral relativists, am not required by my philosophy to treat all aesthetic - or moral - opinions as equally valid, and so I can dismiss such claims as erroneous. The person who asserts that red is objectively the best color to prefer is simply wrong. However, the moral relativist is bound by his own beliefs never to make such an assertion, and therefore cannot give the parallel response to moral objectivists. If there is even one universal moral principle, moral relativism contradicts itself and is therefore false.
Another ill-founded objection is that moral relativism can be supported as a matter of logic - that is, the assertion that one person's moral beliefs are not binding on another is not itself a moral belief, but a factual assertion that one can objectively prove to be right or wrong, and therefore a moral relativist can deny it and remain consistent.
This argument is easily shown to be false. By definition, morality is precisely that system of thought which states how intelligent beings should act. Therefore, claims about how we should make moral decisions are themselves moral claims. Meta-morality is morality, and again the moral relativist cannot escape logical paradox. What is a moral relativist really saying, other than "It is universally morally true that universal moral beliefs are not true"? This belief is plainly self-contradictory and therefore must be thrown out.
Moral relativism cannot be stated in a consistent and non-self-contradictory way, and so - unless we deny the rules of logic altogether - it inevitably collapses in paradox and must be discarded. The only remaining possibility, one that does not suffer from similar self-contradiction, is moral objectivism. In other words, there are universally valid and binding moral principles that are not reducible to mere preference or opinion. The remainder of this series will explore what those principles are.
http://www.daylightatheism.org/2006/08/ ... ity-i.html