Title Case headings
- Id
- title-case-headings
- Status
- Contested
- Severity
- low
- Detection
- deterministic
- Evidence grade
- corroborated
- Languages
- en
- Added
- 2026-08-15
- Updated
- 2026-08-17
Credible people dispute that this signals anything at all.
What it is
Headings capitalise every main word in a publication whose house style is sentence case. The tell exists only against a named convention, which is why this entry stays contested.
Why it reads as machine-made
Wikipedia records that chatbots strongly tend to capitalise all main words in section headings, and cites the 2025 work on people who use these tools heavily and recognise their output. The habit comes out of documentation, slide decks and listicles in the training material, where headline capitalisation is the norm. Set against a publication that writes headings in sentence case, the mismatch is visible on the page. Set against a United States editorial style sheet, there is nothing to see.
Specimens
Impact Of Technology On Regional Growth Digital tooling has changed how the region thinks about growth, and much of that change took place before anyone had settled on a name for it. Sustainable Development And Local Policy Officers will bring a further report to committee in due course. The authority remains committed to an approach that balances growth with the needs of existing communities, and further engagement with stakeholders is anticipated in the usual way. A number of options remain under consideration at this stage.
Regional growth after the 2024 reporting change Councils began publishing quarterly figures in March 2024. Two of the eleven councils missed the first deadline, and both blamed the same spreadsheet template, which rounded part-year revenue to the nearest million.
Figures in this repair are invented for the specimen. The tell is the capitalisation of the heading lines, which is why the body under them carries nothing a reader could check: an index card flattens the line breaks, so the prose has to read as machine-made on its own.
How it is detected
- Pattern
- ^[ \t]*[A-Z][A-Za-z0-9]*(?:[ \t]+(?:[A-Z][A-Za-z0-9]*|of|the|and|in|for|to|a|an|or|with|on)){4,}[ \t]*$
- Flags
- gm
- Scope
- document
Who writes this way legitimately
American editorial style mandates headline capitalisation, and the Chicago Manual of Style, wire-service headline conventions and most United States magazines all require it. Marketing teams inherit it from slide templates and content management systems that title-case automatically, so nobody chose it. Non-native English writers taught from American style guides apply it consistently. A reviewer has to find the house style sheet before treating a capitalised heading as anything: this is a signal only where sentence case is the stated rule and where the same writer used sentence case in earlier work. Everywhere else it is a preference.
Model attribution
Unassigned at family level. Wikipedia describes the tendency as general to chatbots and cites the 2025 study of heavy tool users for it. No paper this project read breaks heading capitalisation down by vendor.
Platform notes
- wikipedia
- Shortcut WP:AITITLECASE. The manual of style calls for sentence case in headings, which is what makes the mismatch legible there and illegible almost everywhere else.
Status history
| Date | Status | Rationale |
|---|---|---|
| 2026-08-15 | Contested | Contested by construction. Wikipedia records the tendency and cites the 2025 study of heavy tool users, so the pattern is real in that corpus. It is also mandated by American editorial style, produced automatically by content management systems, and baked into slide templates, so the base rate in the affected genres is enormous. The pattern requires a standalone line of five or more words with no terminal punctuation, so running prose never registers. Regex verified on 2026-08-15 against its own specimen and four negatives. |
Sources
- 01Wikipedia: Signs of AI writingcommunityaccessed 2026-08-14
- 02vale-ai-tells, 111 machine-checkable rulescommunityaccessed 2026-08-14
- 03
CC BY 4.0 / The AI Tells Index, feedsquad.com/ai-tells