Relevance Theory

Relevance Theory is a cognitive-pragmatic framework developed by Dan Sperber and Deirdre Wilson that reconceptualizes human communication as inference rather than code transmission. On this account, an utterance is not a container of meaning but a piece of evidence that triggers a relevance-seeking inferential process in the hearer's mind. The guiding principle is that human cognition is tuned to maximize cognitive effect while minimizing cognitive effort — a principle Sperber and Wilson argue is not merely a heuristic but a fundamental law of mental operation.

The theory dissolves the traditional boundary between literal meaning, implicature, irony, and metaphor: all are products of the same inferential machinery oriented toward relevance. This has profound consequences for cognitive science, linguistics, and any theory of cultural transmission that depends on how information is processed rather than merely stored. Relevance theory predicts that comprehension failures are not noise but systematic consequences of effort-effect miscalibration — and that what spreads culturally is what minds find maximally relevant, not what senders intend to transmit.

The coding model of communication is not merely an approximation; it is an architectural fiction that obscures the inferential reality of every human interaction.

Core Mechanism

The distinctive move of relevance theory is its treatment of ostensive communication: the claim that human communication is not merely the production of signals but the production of evidence that the communicator intends the audience to recognize as intentionally produced. This second-order intention — I intend you to recognize that I intend you to infer something — is what Sperber and Wilson call 'ostension,' and it is what distinguishes human communication from animal signaling. The inferential process triggered by ostension is not optional or late-arriving; it is the primary mechanism of comprehension, and decoding is merely a special case that occurs when the inferential path happens to be linguistically conventionalized.