How did logical positivists interpret ethical value judgments?

Logical positivists interpreted ethical value judgments through the lens of emotivism, a theory asserting that such statements lack cognitive or factual meaning. Because these judgments cannot be verified through observation or experiment—the core requirement of the principle of verification—they are not considered true or false descriptions of the world.123

Instead, logical positivists argued that moral assertions, such as "one should not tell lies," function primarily as expressions of personal feelings or attitudes. In this view, a value judgment is akin to an emotional exclamation, such as "Ouch!". While these statements may contain a factual core regarding the potential consequences of an action, the normative component—expressed by terms like ought, should, or right—is viewed as having only emotional and motivative significance.12

Early proponents, including A.J. Ayer, faced criticism for seemingly reducing moral norms to mere expressions of taste. Later thinkers, such as Charles Stevenson, sought to refine these analyses by better distinguishing between the cognitive and normative components of value statements to provide a more nuanced account of ethics.1