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Non-cognitivism is the meta-ethical view that ethical statements (such as 'Killing is wrong') do not assert propositions; that is to say, they do not express factual claims or beliefs and therefore are neither true nor false (they are not truth-apt). This distinguishes it from moral realism, which holds that ethical statements are objectively and consistently true or false; ethical subjectivism, which proposes that ethical statements assert propositions about the speaker's own attitudes; moral skepticism, which proposes that all ethical statements are false; and cognitivist irrealism, which asserts that ethical statements are true or false (this is ethical cognitivism), although there are no worldly facts to make them true or false.
There are three major schools of thought among non-cognitivists as to what meaning ethical statements do have. Emotivism, while not necessarily non-cognitive, is generally defended as a non-cognitive theory. Emotivists suggest that they are expressions of emotional response, desire and aversion, approval and disapproval: under this view, the statement "Killing is wrong," for example, can be paraphrased as "Boo to killing!" or "Killing, yuck!". Statements such as "helping people is good" can be paraphrased as "Hooray for helping people!" A close cousin of emotivism, developed by R. M. Hare, is called prescriptivism. Prescriptivists interpret ethical statements as commands or prescriptions: "Killing is wrong," in this model, is equivalent to "Do not kill". Expressivism, including Simon Blackburn's quasi-realism and Allan Gibbard's norm-expressivism, defends that non-cognitive attitudes underlie moral discourse and this discourse therefore consists of non-declarative speech acts, although accepting that its surface features may consistently and efficiently work as if moral discourse were cognitive. The point of interpreting moral claims as non-declarative speech acts is to explain why moral claims are neither true nor false. Utterances like "Boo to killing!" and "Don't kill" are not candidates for truth or falsity.
Arguments in favor of non-cognitivismEdit
As with other non-objectivist models of morality, non-cognitivism is largely supported by the argument from queerness: ethical properties, if they existed, would be different from any other thing in the universe, since they have no observable effect on the world. People generally have a negative attitude towards murder - call it a disgust - and this keeps most of us from murdering. But does the actual wrongness of murder play an independent role? Is there any evidence that there is a property of wrongness that some types of acts have? Some people might think that the strong feelings we have when we see or consider a murder provide evidence of murder's wrongness. But it is not difficult to explain these feelings without saying that wrongness was their cause. Thus there is no way of discerning which, if any, ethical properties exist; by Occam's Razor, the simplest assumption is that none do. The non-cognitivist then asserts that, since a proposition about an ethical property would have no referent, ethical statements must be something else. (Note that moral skeptics would say ethical statements are indeed propositions with no referent, and therefore false.)
Arguments for Emotivism focus on what normative statements express when uttered by a speaker. A person who says that killing is wrong certainly expresses her disapproval of killing. The Emotivist claims this is all she does, and that "Killing is wrong" is not a truth-apt declaration. The burden of evidence is on the the cognitivists who want to show that in addition to expressing disapproval, the claim "Killing is wrong" is also true. Is there really evidence that killing is wrong? We have evidence that Jupiter has a magnetic field and that birds evolved from dinosaurs. But even our best scientists have never discovered any evidence for a property like wrongness - and they never will. Without such evidence, why should we think there is such a property? Ethical Intuitionists think the evidence comes not from science but from our own feelings: good deeds make us feel a certain way and bad deeds make us feel very differently. But is this enough to show that there are genuinely good and bad deeds? The Emotivists think not. We don't need to postulate the existence of moral "badness" or "wrongness" to explain why considering certain deeds makes us feel disapproval. All we really observe when we introspect are feelings of disapproval, so why not adopt the simple explanation and say that this is all there is? Why insist that a genuine "badness" (of murder, let's for example) must be causing feelings, when a simpler explanation is available?
Arguments for prescriptivism, by contrast, focus on the function of normative statements. A person telling another that killing is wrong probably does not want this other person to then go off and kill someone, and may be explicitly attempting to stop him from doing so. Thus the statement "Killing is wrong," calculated to prevent someone from killing, can be described as an exhortation not to do so.
Arguments against non-cognitivismEdit
One argument against non-cognitivism is that it ignores the external causes of emotional and prescriptive reactions. If someone says, "John is a good person," something about John must have inspired that reaction. If John gives to the poor, takes care of his sick grandmother, and is friendly to others, and these are what inspire the speaker to think well of him, it is plausible to say, "John is a good person (i.e. well thought of) because he gives to the poor, takes care of his sick grandmother, and is friendly to others." If, in turn, the speaker responds positively to the idea of giving to the poor, then some aspect of that idea must have inspired a positive response; one could argue that that aspect is also the basis of its goodness.
Another argument is the "embedding problem." Consider the following statements:
Eating meat is not wrong. Is eating meat wrong? I think that eating meat is wrong. Mike doesn't think that eating meat is wrong. I once thought that eating meat was wrong. She does not realize that eating meat is wrong.
Attempts to translate these sentences in an emotivist framework seem to fail ("She does not realize, 'Boo on eating meat!'") Prescriptivist translations fare only slightly better ("She does not realize that she is not to eat meat"). Even the act of forming such a construction indicates some sort of cognition in the process.
In some non-cognitivist points of view, these sentences simply assume the false premise that ethical statements are either true or false. They might be literally translated as:
"Eating meat is wrong" is a false statement. Is "eating meat is wrong" a true statement? I think that "eating meat is wrong" is a true statement. Mike doesn't think that "eating meat is wrong" is a true statement. I once thought that "eating meat is wrong" was a true statement. She does not realize that "eating meat is wrong" is a true statement.
These translations, however, seem divorced from the way people actually use language. A non-cognitivist would have to disagree with someone saying, "'Eating meat is wrong' is a false statement" (since "Eating meat is wrong" is not truth-apt at all), but may be tempted to agree with a person saying, "Eating meat is not wrong."
One might more constructively interpret these statements to describe the underlying emotional statement that they express, i.e: I disapprove/do not disapprove of eating meat, I used to, he doesn't, I do and she doesn't, etc.; however, this interpretation is closer to subjectivism than to non-cognitivism proper.
A similar argument against non-cognitivism is that of ethical argument. A common argument might be, "If killing an innocent human is always wrong, and all fetuses are innocent humans, then killing a fetus is always wrong." Most people would consider such an utterance to represent an analytic proposition which is true a priori. However, if ethical statements do not represent cognitions, it seems odd to use them as premises in an argument, and even odder to assume they follow the same rules of syllogism as true propositions.
- rsrevision.com's pages on Metaethics Emotivism, Intuitionism and Prescriptivism with explanations, criticisms and linksde:Emotivismus
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