Who first formulated the is-ought problem?

The Scottish philosopher David Hume articulated the principle in his 1739 work A Treatise of Human Nature.

Why is the leap from is to ought logically problematic?

Because descriptive statements about reality contain no normative ethical terms, making any prescriptive conclusion logically invalid without explicit moral premises.

How does the Agency text apply Hume's law?

The author uses Hume's law to argue that thinkers should never force their subjective conclusions upon others, respecting the unique moral perspectives of different minds.

Concept

Is-Ought Problem

Philosophy & Ethics

What is the is-ought problem?

The is-ought problem is an ethical and epistemological principle stating that one cannot logically deduce prescriptive moral obligations merely from descriptive factual statements. Formulated by David Hume, it asserts that no factual observation of what is can automatically justify what ought to be.

In short

The is-ought problem, also known as Hume's guillotine, exposes the logical fallacy of deriving moral claims directly from factual assertions. David Hume pointed out that writers often slide from describing natural states to prescribing ethical duties without justification. Recognizing this gap protects individual moral judgment and fosters intellectual tolerance.

Key facts

Who first formulated the is-ought problem?: The Scottish philosopher David Hume articulated the principle in his 1739 work A Treatise of Human Nature.
Why is the leap from is to ought logically problematic?: Because descriptive statements about reality contain no normative ethical terms, making any prescriptive conclusion logically invalid without explicit moral premises.
How does the Agency text apply Hume's law?: The author uses Hume's law to argue that thinkers should never force their subjective conclusions upon others, respecting the unique moral perspectives of different minds.

Overview

David Hume introduced his famous critique to challenge moral philosophers who smoothly transitioned from observations regarding human nature to assertions of moral duty. Hume observed that descriptions of factual conditions belong to an entirely different logical category than normative pronouncements about how people should behave. Bridging this chasm requires an independent ethical premise that cannot be extracted from empirical observation alone. This insight, frequently termed Hume's guillotine, remains a cornerstone of meta-ethics, analytic philosophy, and value theory.

In the Agency editorial

In Issue 10, the author references David Hume's law to emphasize intellectual humility and mutual respect among creative thinkers. The essay argues that recognizing the boundary between what is and what should be prevents philosophers from imposing their personal dogmas onto others. By upholding this distinction, the metamodern practitioner honors the irreducible subjectivity of each person, treating diverse perspectives as vital contributions rather than ideological deviations.

Source editions

Where this entry comes from in the Agency editorial.

Also from these editions: concepts

Also from these editions: terms

Related terms

Discernmentnoun: The ability to judge well, perceive keen distinctions, and grasp obscure psychological or practical truths.
Maximnoun: A concise statement expressing a fundamental principle, general truth, or practical rule of conduct.
Paradoxnoun: A statement, situation, or person that appears contradictory or absurd yet may reveal a deeper underlying truth.
Skepticnoun: A person inclined to question, doubt, or suspend judgment regarding accepted opinions, claims, or apparent facts until verifiable proof is presented.

Sources

Issue.10 - Numbers (opens in a new tab), Agency Brasil
Wikipedia: Is–ought problem (opens in a new tab)