Definitions, Facts & Values — I can identify when a debate is about definitions, facts, or values and explain the difference.

Historical Context & Motivation

Philosophers have long recognized that not all disagreements are created equal. Two people arguing about whether a tomato is a fruit may seem trivial, but the dispute reveals something deep about the architecture of human reasoning: the parties are not disagreeing about any observable feature of the tomato but about how the word fruit ought to be applied. This insight—that disputes can be definitional, factual, or evaluative in nature—has roots stretching back to antiquity and remains one of the most practically powerful tools in the philosopher's toolkit. The failure to diagnose the type of disagreement at play is arguably the single greatest source of unproductive debate in academic, political, and everyday life.

In ancient Greece, Socrates distinguished himself by relentlessly pursuing definitional questions—asking "What is justice?" or "What is courage?" rather than assuming shared meanings. Aristotle later separated questions of fact (what is the case) from questions of value (what ought to be the case) in his ethical and rhetorical writings. The modern articulation of this tripartite distinction—definitions, facts, and values—crystallized through centuries of philosophical development, from Hume's celebrated is–ought gap to the logical positivists' aggressive segregation of meaningful propositions from mere expressions of preference.

The central question this lesson addresses is deceptively simple: When two people disagree, what exactly are they disagreeing about? Answering that question accurately is the first step toward resolving—or at least clarifying—virtually any debate.

Core Principles & Definitions

The framework rests on a fundamental observation: every claim in a debate can be classified according to the kind of support or challenge it requires. A definitional claim concerns the meaning of a term or the boundaries of a concept. A factual claim concerns what is or was the case in the empirical world. A value claim concerns what is good, right, beautiful, or desirable. Recognizing which type of claim is at stake determines what kind of evidence, reasoning, or argument is relevant—and what kind is beside the point.

Visual Explanation — The Three Domains of Disagreement

The diagram above illustrates the central analytical framework. Notice that each domain has a characteristic question and a characteristic method of resolution. When you encounter a disagreement—in a seminar, in a policy debate, or in daily life—your first diagnostic move should be to ask: Which of these three questions is really at stake here? A definitional dispute asks what a term means. A factual dispute asks what the world is like. A value dispute asks what we should want or do. Getting this diagnosis wrong means applying the wrong tools—like trying to resolve a moral disagreement with a statistical study, or trying to settle a factual question by redefining words.

How It Works — Diagnostic Tests for Each Type

Identifying the type of dispute is not always straightforward, particularly because natural language often blurs the boundaries. A statement like "Capitalism is exploitation" could be a definitional claim (exploitation is part of the meaning of capitalism), a factual claim (capitalism as practiced results in exploitation), or a value claim (capitalism is morally wrong because it is exploitative). To disambiguate, philosophers employ a set of diagnostic tests—heuristic questions that help isolate which type of disagreement is operative.

Diagnostic Test 1 — The Substitution Test (Definitions)

Ask: If both parties agreed on the facts and the values, would the disagreement disappear if they adopted the same definition? If yes, the dispute is definitional. Consider the question "Is Pluto a planet?" The astronomical data is not in dispute, nor do the parties differ on what is valuable. They differ on the criteria for planethood. Once the International Astronomical Union stipulated a new definition in 2006, Pluto was reclassified—not because any new fact was discovered, but because the definitional criteria changed.

Diagnostic Test 2 — The Evidence Test (Facts)

Ask: Is there, in principle, some observation, experiment, or data set that would settle this dispute? If both parties would accept the conclusion of a well-designed empirical investigation, the dispute is factual. "Does raising the minimum wage increase unemployment?" is a factual question—even if the current evidence is contested, both sides agree that sufficiently rigorous economic data could, in principle, settle the matter. The hallmark of a factual dispute is that it is empirically decidable in principle, even if it is difficult to decide in practice.

Diagnostic Test 3 — The Omniscience Test (Values)

Ask: If both parties knew all the relevant facts and agreed on all the relevant definitions, would they still disagree? If so, the remaining disagreement is about values. Consider two policymakers who agree on exactly how many lives a particular surveillance program saves and exactly how much privacy it infringes. If they still disagree about whether the program should be implemented, their dispute is about the relative weight of security versus privacy—a value judgment that no additional empirical data can resolve.

Detailed Classification — Linguistic Markers & Examples

Beyond the diagnostic tests, attentive listeners can often identify the type of dispute by attending to the linguistic markers speakers use. Definitional disputes frequently employ phrases like "that's not what I mean by," "properly speaking," or "by definition." Factual disputes invoke "the evidence shows," "studies indicate," or "historically speaking." Value disputes are signaled by "we should," "it's wrong to," "the right thing is," or "what matters most is." These markers are not infallible—speakers often use factual language to smuggle in value claims, or definitional moves to avoid engaging with evidence—but they provide useful initial cues for the analyst.

Worked Example — Analyzing a Policy Debate

Consider the following debate between two commentators about affirmative action in university admissions. Commentator A says: "Affirmative action is discrimination—it treats people differently based on race, which is by definition discriminatory." Commentator B responds: "Affirmative action reduces inequality; the data show that minority students' enrollment and graduation rates improve significantly when such policies are in place, so it promotes fairness." Let us apply the framework to disentangle this exchange.

Strengths, Limitations, and Common Pitfalls

Like any analytical framework, the definitions–facts–values trichotomy has significant strengths as well as important limitations. Understanding both is essential for using the framework responsibly and effectively. The table below summarizes the main considerations.

Connection to Advanced Theory — Thick Concepts and the Fact–Value Entanglement

The clean tripartite distinction between definitions, facts, and values is a powerful introductory tool, but advanced philosophical theory complicates the picture in productive ways. One of the most important developments is the analysis of thick concepts—terms like 'cruel,' 'courageous,' 'just,' or 'generous' that simultaneously describe the world and evaluate it. When someone calls an action 'cruel,' they are both asserting a factual claim (the action causes suffering) and expressing a negative evaluation. Thick concepts resist being neatly decomposed into a factual component and a separate evaluative component, which challenges the strict separation assumed by the basic framework.

The philosopher Hilary Putnam argued in The Collapse of the Fact/Value Dichotomy (2002) that the strict separation between facts and values was itself a philosophical error inherited from logical positivism. For Putnam, even the selection of which facts are relevant to a question involves value judgments about what matters. This does not render the definitions–facts–values framework useless; rather, it suggests that the framework should be understood as a first-order analytical tool that can be refined with more sophisticated theory as the analyst's skill develops. Think of it as analogous to Newtonian mechanics: not the final word, but an indispensable starting point that remains accurate and useful across a wide range of ordinary cases.

Practice Problems

Summary