Subjectivist Fallacy

The subjectivist fallacy (SbF), also known as the relativist fallacy, occurs when someone treats the truth of an objective proposition as dependent on who believes it. It is a fallacy of relativism—specifically, a misapplication of subjective relativism to judgments that are objective in nature. At its core, the fallacy confuses truth with belief, mistakenly assuming that because someone holds a belief, that belief must correspond to reality for them.

Objective vs. Subjective Judgments

Judgments may be characterized as either objective or subjective. An objective judgment concerns a claim whose truth does not depend merely on a person’s belief. It need not be a necessary truth: a historical fact could have been otherwise. For example, the claim that Immanuel Kant was 5 feet tall is objective: if true, it is true for everyone. A subjective judgment, by contrast, depends on a perspective, experience, or standard being used. The claim that, when walking around his neighborhood, Kant walked quickly is subjective; its truth may be deemed true or false relative to one’s own walking pace.

A vital distinction must be drawn between truth, belief, and taste or preference. Truth is a matter of correspondence to reality: as philosopher J.L. Mackie explains, “for a statement to be true is for things to be as they are stated to be.” A belief, on the other hand, is a conviction or opinion about something, and it can be either true or false. Simply believing something does not make it true. Taste or preference concerns what one likes or enjoys—such as preferring the writings of Nietzsche over Plato, or coffee over tea—and a report of that preference can itself be factually correct. The preference does not establish that the favored item is best by every standard. The subjectivist fallacy often arises when these categories are blurred, treating an objective truth claim as if it were merely a matter of personal belief or taste.

Relativism and the Fallacy

Relativist accounts make truth or justification relative to a person, framework, or standard; different versions make different claims. Subjective relativism holds that the truth of a judgment about something is relative to the subject making the judgment. The subjectivist fallacy occurs when this move is made for a proposition that is actually objective—i.e., its truth is independent of any one person’s viewpoint. Put simply: it is the error of thinking that because a person believes something, that makes it true for them in a way that overrides objective fact. The quintessential expression of this fallacy is the phrase, “That may be true for you, but it is not true for me.”

Logical Form

1. Person 1 claims X is objectively true.
2. Person 2 claims X is true for Person 1, but not for Person 2.
3. Person 2 commits the fallacy if this reply merely dismisses an objective issue without addressing the claim or its evidence.

Examples

Modern Instances

• Person A says, “Smoking is unhealthy.” Person B replies, “That’s just your truth; for me, it might not be.” Personal belief does not remove smoking’s health risks, even though the risks and outcomes vary between people.
• Person A says, “Rape is wrong.” Person B counters, “That’s just your truth; for me, it’s a way of life.” The reply dismisses a moral objection by appealing to personal acceptance. It does not address reasons about harm, consent, or responsibility. A label alone also does not settle every philosophical dispute about moral objectivity.

The Philosophical Example The Stoic philosopher Epictetus famously observed, “It is not things that upset people but rather ideas about things” (Enchiridion §5). This insight is valid when applied to subjective outcomes: one’s emotional reaction to an event is indeed relative to one’s own impressions. For instance, whether an insult upsets you depends on your internal state. But it would be fallacious to extend this relativism to the objective facts of the situation. It would be absurd to claim that whether someone has a physical disease depends on how they feel or think about the disease. The objective reality of the disease is not subject‑relative.

How the Fallacy Is Often Pushed Too Far

The slide into the subjectivist fallacy typically happens in one of two ways:

1. Language‑based skepticism: claiming that we can never describe an objective state of affairs in language because all language merely expresses our impressions or ideas.
2. Diversity‑of‑impressions skepticism: arguing that because different people will have different impressions about some mind‑external thing or event, the truth of any claim about that thing or event must be subject‑relative.

Both moves confuse the subjective character of our descriptions or reactions with the objective character of the things themselves. Different descriptions and reactions do not, by themselves, show that the event described depends on who believes it happened.

Self‑Refutation

The strongest version of the claim—that every belief is made true for its holder merely by being believed—has difficulty accounting for error. It also faces the question of what to do with someone who rejects that claim. This objection targets that sweeping position; it is not a refutation of every account of perspective or context.

How to Avoid the Fallacy

To assess a reply, identify the claim and the evidence offered for it. Ask whether people disagree about a fact, use different standards, or report different experiences. Personal conviction is not enough to settle an objective issue, and accusing someone of subjectivism is not a substitute for supporting your own claim.

Exceptions

Many things are indeed relative to the person to whom a rule or judgment applies—this is not fallacious. For example, whether a walk is “quick” is a subjective judgment; it rightly varies from person to person. Similarly, favoring one author over another reports a preference; it need not assert that the author is objectively superior. The subjectivist fallacy only occurs when such relativization is incorrectly applied to an objective truth. Recognizing the difference between objective and subjective claims is the key distinction.