Truth, Relativism, and Constructivism

What Makes Something True?

Correspondence theory says a statement is true if it corresponds to reality. 'It is raining' is true if and only if it is actually raining. The idea traces back to Aristotle, who wrote in the Metaphysics that to say of what is that it is, and of what is not that it is not, is true. It is intuitive and works well for simple factual claims, but struggles with more complex statements like 'democracy is the best form of government' — what reality does that correspond to?

Coherence theory says a statement is true if it fits consistently within a system of beliefs. A new scientific finding is accepted when it coheres with established theory and evidence. This captures how knowledge actually works in practice but risks circularity: a system of beliefs could be internally coherent yet entirely disconnected from reality.

Pragmatic theory (Charles Peirce, William James, John Dewey) says a statement is true if it works — if acting on it produces successful results. A map is 'true' if following it gets you where you want to go. This is practical but controversial: does a useful lie count as truth?

A fourth family, the deflationary or redundancy theory (Frank Ramsey, later Paul Horwich), argues that 'it is true that it is raining' says nothing more than 'it is raining' — truth is not a deep property but a useful linguistic device.

Worked Example: One Claim, Four Theories

Take a single sentence — 'The Amazon rainforest is shrinking' — and run it through each theory to see how they differ in what they demand.

Notice that for a straightforward empirical claim the theories mostly agree — the forest either is or is not shrinking, and satellite measurements settle it. The theories diverge most sharply on hard cases: moral claims, mathematical truths, and statements about the future. Alfred Tarski's 1944 'semantic conception of truth' gave the correspondence intuition a rigorous form with his schema: the sentence 'snow is white' is true if and only if snow is white. This deceptively simple formula anchors much of modern logic and shows why, for factual claims, truth is not up for negotiation.

Relativism: More Nuanced Than You Think

Relativism is often caricatured as 'all truth is relative' or 'everyone is entitled to their own truth.' Serious philosophical relativism is more nuanced. It recognizes that some claims are genuinely perspective-dependent: whether a piece of art is beautiful, whether a meal is delicious, or whether a political system is just may legitimately depend on cultural and individual values.

But factual claims — the earth orbits the sun, vaccines prevent disease, CO2 traps heat — are not perspective-dependent. They are true or false regardless of what anyone believes. The dangerous move is extending relativism from legitimate domains (aesthetics, values) to factual claims (science, history, evidence), which produces a world where 'my truth' becomes a shield against inconvenient facts.

Social constructivism offers a middle ground: our categories and frameworks for understanding reality are socially constructed (borders, money, race as a social category), but the physical reality those frameworks describe is not. The philosopher John Searle calls these 'institutional facts' — real, but real only because we collectively treat them as such. Understanding what is constructed and what is not is crucial for clear thinking.