Discourse community

A discourse community is a group of people who share unwritten rules about what can be said and how it can be said — the rules you learn by joining, not by reading a manual.

John Swales named the idea in 1990: each community (academic writers, software developers, biomedical researchers) has stated and unstated conventions that shape what counts as a valid contribution, how arguments are built, and which binding forms are expected. A deviation from usage requires justification — or it gets edited out in review. The convention is not a law but it acts like one: it sets the default, and the default is invisible precisely because everyone shares it.

The concept matters for the canary-author because the community's conventions define what counts as a deviation — and a conventional binding form is not a deviation. If every academic text uses conjunction and lexical cohesion to link sentences, then a tail following a hook via conjunction is the norm, not a fingerprint. The discourse community's conventions both make a binding form safe (everyone uses it, so it reproduces reliably) and make it invisible (everyone uses it, so it does not single out one author's tail). The canary-author's craft is to know the community well enough to see which forms are conventional and which are distinctive — and the midpoint lives in the community's own judgment, which the author may not know in advance.

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cohesion · merger-doctrine · canary-trap · entitlement