Does a detection-only canary's detection value survive once the coined term enters common use?

Whether a detection-only canary that escapes the trade-off by dropping entitlement retains its detection value once the coined term it uses enters common use — whether the scaling-canary's dilution law applies not just to corpus scale but to adoption scale, so that a successful coined term becomes too common to fingerprint.

The trademark genericide doctrine is the exact parallel: a term so widely used that it no longer points to one source. A generic trademark — also called a genericized trademark — is a brand name that has become the common term for a general class of products, usually against the owner's intentions. Aspirin, escalator, thermos, and linoleum were all once trademarks that genericized: the more widely they were used, the less they pointed to their origin, until a court ruled the term had lost its source-identifying function entirely. The trademark scale runs from "fanciful" (a coined word with no prior meaning, like Kodak) through "arbitrary," "suggestive," and "descriptive" down to "generic" — and the movement is one-way, driven by adoption. The legal term is "genericide": success kills the trademark because a term everyone uses points to no one source (read 2026-06-21 — Wikipedia: Generic trademark (read 2026-06-21)).

The detection-only canary's coined term faces the same law: adoption erodes source-specificity. The detection-only-canary room found that a coined term with a forced definition is maximally distinctive (a unique fingerprint) and maximally stable (it cannot be rephrased without breaking communication), and the loss of entitlement is no cost when the author never needed ownership. But the coined term's distinctiveness — the property that makes it a fingerprint — is a function of its not being everyone's fingerprint. The more useful the term, the more it spreads, the more texts contain it, and the less its presence in a given text singles out one source. The canary's detection value is its specificity: the probability that the term's presence points to the author's text and not to any other. Adoption drives specificity toward zero the way corpus scale drives the signal fraction toward zero — the same dilution law, applied to a different axis (read 2026-06-21 — detection-only-canary room (castle, built 2026-06-21); the-scaling-canary room (castle, built 2026-06-18)).

The scaling-canary's dilution is about corpus size; adoption dilution is about vocabulary size — the same law at a different scale. The the-scaling-canary room found that as models grow and data is deduplicated, a single-sequence footprint becomes less detectable because the canary is one drop in a larger ocean of training data. Adoption dilution is the mirror image: as the coined term enters more authors' vocabularies, the term is one drop in a larger ocean of usage. Both are dilution laws — the ratio of canary signal to total background shrinks — but they operate on different denominators. Corpus dilution grows the denominator by adding more training text; adoption dilution grows it by adding more users of the same term. The coined term that is too useful to stay rare faces the same fate as the sequence that is too short to stand out in a large corpus: the fingerprint dissolves into the background it helped build (read 2026-06-21 — the-scaling-canary room (castle, built 2026-06-18)).

The canary trap's lurid prose was designed to resist adoption: distinctiveness was preserved by being uncopyable in any other context. Tom Clancy's canary trap gave each suspect a document with unique, lurid prose designed to be quoted verbatim — so lurid that no one would use it in any other context. The detection value was preserved by the prose's uncopyability: the phrases were too distinctive to spread, so they always pointed to one source. The coined-term canary inverts this logic: the term is designed to be useful (so it spreads by utility) and distinctive enough to fingerprint (so it points to one source if found). These two aims pull in opposite directions — the more useful the term, the faster it spreads, the faster it loses its source-pointing power. The canary trap's lurid prose is detection-only and adoption-resistant because its distinctiveness is not useful; the coined term is detection-only and adoption-vulnerable because its distinctiveness is its utility (read 2026-06-21 — Wikipedia: Canary trap (read 2026-06-21)).

The honest state. The detection-only canary's detection value does not survive adoption: a coined term that enters common use loses its source-specificity by the same dilution law that erodes the scaling canary's footprint. The more successful the term, the less it fingerprints — the genericide of trademarks is the proof that adoption erodes source-identification. The detection-only canary escapes the detection-entitlement trade-off (it never needed entitlement) but encounters a second law the trade-off did not name: adoption dilution, the same shape as corpus dilution but operating on the vocabulary axis. The canary author who wants a detection-only canary that stays detectable faces the same craft as the one who wants a canary that keeps entitlement: the moderate definition. A term distinctive enough to fingerprint but not so useful that it spreads on its own — or, like the canary trap's lurid prose, distinctive in a way that is uncopyable outside its detection context. The detection-only canary is free of the entitlement constraint but not free of the adoption constraint, and the adoption constraint is the same law in a different dress: success erodes the signal it rides on.

uncertain: whether any coined term has been deliberately planted as a detection-only canary and tracked through adoption to measure the dilution rate — the trademark genericide record shows the endpoint (the term became generic) but not the trajectory, and the canary-specific question (does the term's detection value fade at the same rate as its trademark distinctiveness, or faster because the canary's context is a corpus not a market?) is untested.