Sentence-opener repetition
- Id
- sentence-opener-repetition
- Status
- Contested
- Severity
- low
- Detection
- statistical
- Evidence grade
- community-observed
- Languages
- en
- Added
- 2026-08-15
- Updated
- 2026-08-15
Credible people dispute that this signals anything at all.
What it is
Consecutive sentences starting from the same small set of words, usually a determiner or one of a handful of connectives. vale-ai-tells implements this as two separate checks, one measuring start entropy and one catching a repeated opener. The anti-slop prompt names the same habit from the other side, as something to suppress, which makes it inverted evidence; it is marked as such in the sources and it does not stand alone here.
Why it reads as machine-made
Openers are where a writer's rhythm shows. Four sentences in a row beginning with the same determiner means the draft was produced and not read back. The signal is weak on its own, because the same shape falls out of a plain declarative style that some people write on purpose. Anaphora abuse is the deliberate version, three or more clauses built to match; this entry is the accidental one, measured over function words.
Specimens
The report landed on Friday. The numbers were lower than expected. The team met on Monday. The plan is being revised.
The report landed on Friday, and signups came in 12 percent under forecast. On Monday the team cut the paid channel and moved that budget to the newsletter, which had been the cheapest source all year.
Four sentences opening on the same word became two that open differently, and the repair names the number and the decision. Figures in this repair are invented for the specimen.
How it is detected
- Metric
- share-of-consecutive-sentences-sharing-an-opening-word
- Threshold
- unset
- Direction
- above
- Threshold basis
- No threshold ships. No published baseline exists for opener repetition in human prose, and detector work shows that structural features of this family carried corpus artifacts rather than authorship. Report the share and the longest run, and treat a run of four as a FeedSquad reading cue that sends the draft back for a pass. It is not a measurement anyone has validated.
Who writes this way legitimately
Writers with a deliberately plain declarative style produce this shape on purpose, and it is standard in instructional and safety writing where every sentence names the same subject for a reason. University teaching centres list consistent sentence structure among the traits that get neurodivergent students falsely accused, and nobody has published a rate for that, so the measure has to stay a reading cue. Check whether the repeated opener refers to the same thing each time; if it does, the repetition is doing reference work and the prose is clearer for it.
Model attribution
No study reports opener repetition by model family. The habit is named in community rule sets and in one prompt written to suppress it, which dates the concern rather than measuring the behaviour.
Status history
| Date | Status | Rationale |
|---|---|---|
| 2026-08-15 | Contested | Ships contested. Two community rule sets carry the pattern and one of them exists to suppress it, but no study measures it, and the shape is produced deliberately by writers with a plain declarative style. |
Sources
- 01vale-ai-tells, 111 machine-checkable rulescommunityaccessed 2026-08-14
- 02anti-slop-writing system prompt and pattern listcommunityaccessed 2026-08-14
Inverted source. Its own purpose runs counter to this index. It is cited for what it records about model output, and never as sole support for an entry.
CC BY 4.0 / The AI Tells Index, feedsquad.com/ai-tells