What Is Non-Cognitivism in Ethics? Definition & Theories

Direct Answer

Non-cognitivism is the metaethical theory that moral judgments express non-cognitive mental states — emotions, attitudes, or prescriptions — rather than beliefs about facts. Where the cognitivist holds that "stealing is wrong" expresses the belief that stealing has the property of wrongness, the non-cognitivist holds that it expresses something like disapproval of stealing or the prescription that stealing not be done. The term "non-cognitive" marks the crucial point: the mental state expressed is not the kind of state that aims to represent the world. A belief can be true or false because it aims at truth; a desire, an attitude, or an emotion does not aim at truth, and neither does the moral judgment that expresses it. Non-cognitivism is therefore a form of anti-realism: there are no moral facts in the world for moral judgments to track, because moral judgments are not in the tracking business. The theory does not say that moral language is meaningless — far from it — but it denies that its meaning is descriptive.

Historical Context

Non-cognitivism arose in the twentieth century from the convergence of two traditions. The first was the sentimentalism of David Hume, who argued that morality is grounded in sentiment rather than reason and that moral distinctions are "not derived from reason." The second was logical positivism, which held that a sentence is factually meaningful only if it is verifiable by experience. In Language, Truth and Logic (1936), A.J. Ayer combined these strands: since moral sentences cannot be verified, they cannot state facts, so they must express emotions. This was emotivism. The theory was refined by C.L. Stevenson and then by R.M. Hare, whose prescriptivism treated moral judgments as universalizable prescriptions. From the 1970s, the theory was reshaped by Simon Blackburn and Allan Gibbard into contemporary expressivism, which retains the non-cognitivist core while attempting to give a rigorous account of how moral language acquires logical and truth-like features. Non-cognitivism dominated analytic metaethics for much of the twentieth century and remains a serious option today.

Key Arguments & Debates

Non-cognitivists argue that their theory explains features of moral life that cognitivism cannot. The argument from motivation is the most important: moral judgments are intrinsically connected to action — sincerely judging that something is wrong normally involves being motivated not to do it — whereas beliefs about facts are motivationally inert. If moral judgments are attitudes or prescriptions, their motivational power is no mystery. The argument from disagreement adds that moral disagreements often persist between people who share all the relevant factual beliefs, which suggests the disagreement is one of attitude, not belief. The theory's central difficulty is the Frege-Geach problem. Moral sentences can be embedded in complex constructions: "If stealing is wrong, then getting your brother to steal is wrong." In such a conditional, "stealing is wrong" is not asserted — yet the sentence is intelligible and can figure in valid arguments. If "stealing is wrong" were just an expression of emotion, how could it be a premise in an inference? Contemporary expressivists answer by giving a sophisticated account of the meaning of moral sentences in terms of the attitudes they express, so that logical relations between moral sentences mirror logical relations between the attitudes. Whether this answer succeeds is one of the most hotly debated questions in metaethics.

Contemporary Relevance

Non-cognitivism continues to shape both metaethics and popular moral thought. In metaethics, expressivism remains a leading theory, defended with technical sophistication. In everyday discussion, the claim that moral judgments are "just expressions of feeling" is a simplified non-cognitivism, and the theory captures something real: moral judgments are practical, emotional, and action-guiding in ways that scientific judgments are not. Understanding non-cognitivism — and its problems — helps you assess both popular skepticism about morality and the philosophical project of grounding ethics in attitudes rather than facts.

Related Concepts

Non-cognitivism is defined against cognitivism, and its leading instances are emotivism and prescriptivism. It is a member of the anti-realist family surveyed in moral anti-realism, and it draws historically on the is-ought problem. Its home discipline is metaethics.

Further Learning

The Stanford Encyclopedia of Philosophy entry on moral cognitivism versus non-cognitivism is the authoritative survey. The Internet Encyclopedia of Philosophy's comparison of the two views is an accessible introduction. A.J. Ayer's Language, Truth and Logic (1936) and Mark Schroeder's Noncognitivism in Ethics (Routledge, 2010) bookend the tradition.