# Copula avoidance (serves as, stands as, functions as) Part of [The AI Tells Index](https://feedsquad.com/ai-tells). A tell signals low effort. It does not identify an author. Skilled writers produce every shape listed here, some of them daily, and automated detectors misread those writers for it at rates measured above 60 percent on non-native English prose. Nothing in this index proves that a machine wrote anything. Read an entry as one piece of evidence to weigh against the false-positive notes printed beside it. ## Facts - Id: copula-avoidance-serves-as - Category: Structural and syntactic (structural) - Subcategory: copula-avoidance - Also known as: serves as a, stands as a, copula avoidance, is/are avoidance, WP:AINOCOPULA, the serves-as dodge, represents in place of is, WP:AINOCOPULA shortcut - Status: Active. Currently signals low-effort writing. - Severity: medium - Evidence grade: corroborated (named independently by multiple credible secondary sources) - Languages: en - Added: 2026-08-14 - Updated: 2026-08-17 - Page: https://feedsquad.com/ai-tells/copula-avoidance-serves-as ## Description Where a plain sentence would use is or was, the text reaches for a heavier verb plus as plus an article. The claim does not change. The sentence gets longer and the subject gets vaguer. Wikipedia files this under avoidance of basic copulatives and attributes a post-2022 decline in is and are to Geng and Trotta. That figure is not stated in the paper's abstract, so treat it as reported rather than confirmed. Huang and colleagues report the same decline in Wikipedia articles, holding lead paragraphs constant. ## Why it reads as machine-written The heavier verb carries no extra information. It lifts the register and leaves the claim exactly where it was. Do it twice in a paragraph and every noun in the piece starts to read like an exhibit label. ## Detection Type: deterministic (a regular expression, run as written) Scope: sentence ECMAScript regular expression. The build validator compiles it and tests it against this entry's own specimens. ```regex \b(?:serves|stands|functions|operates)\s+as\s+(?:a|an|the)\b ``` Flags: gi ## Examples Constructed specimens. Written for this index. Never quoted from anyone's posts. ### Specimen 1 Before, exhibiting the tell: > The old mill serves as a reminder of what the town used to be and stands as a focal point for the community. Buildings like it tend to hold a place in local memory long after the work that filled them has gone. What matters is that the space still brings people together, and that the story behind it is not forgotten. After, repaired: > The grain mill closed in 1974 and reopened as a market hall in 2019. The Saturday produce market runs out of the old drying floor, which is the only part of the building that kept its original floorboards. Note: Sixty words about a building, and not one of them says what happened to it. The repair says what happened to it. Figures in this repair are invented for the specimen. ## False positives Who legitimately writes this way. Heritage and travel writing use this construction to describe function without asserting change, and it is standard in that register. Bare job titles after "as" do not match the pattern, but articled descriptions do: "serves as the director of the county health department" fires, and that phrasing is ordinary in bios, obituaries and board announcements. Treat a hit in biographical copy as noise unless the surrounding text also avoids dates and events. ## Model attribution Observed across chat assistants generally. No study assigns the construction to a model family. The two corpus measurements are of human academic and encyclopedic writing after 2022, not of any single product's output. ## Platform notes - wikipedia: Shortcut WP:AINOCOPULA. Wikipedia pairs it with the inverted tell: simple is and has phrasing appears under signs of human writing, based on 25 years of article text. - linkedin: Nothing in LinkedIn's policy addresses sentence construction. The stated target is content that restates without adding, which this construction tends to accompany rather than cause. ## Sources 1. Wikipedia: Signs of AI writing, section on avoidance of basic copulatives https://en.wikipedia.org/wiki/Wikipedia:Signs_of_AI_writing (tier: community; accessed 2026-08-14) 2. Geng and Trotta: Is ChatGPT Transforming Academics' Writing Style? https://arxiv.org/abs/2404.08627 (tier: primary-doc; accessed 2026-08-14) 3. Huang, Xu, Geng, Wan, Chen: Wikipedia in the Era of LLMs, Evolution and Risks https://openreview.net/pdf?id=ahVmnYkVLt (tier: primary-doc; accessed 2026-08-14) 4. Reinhart et al.: Do LLMs write like humans? Variation in grammatical and rhetorical styles, PNAS 122(8) (PubMed Central copy) https://pmc.ncbi.nlm.nih.gov/articles/PMC11874169/ (tier: peer-reviewed; accessed 2026-08-14) 5. Birattari: Come evitare le ripetizioni moleste quando scriviamo? (Italian style norm against repetition) https://www.illibraio.it/news/grammatica/come-evitare-ripetizioni-quando-scriviamo-540892/ (tier: press; accessed 2026-08-14) 6. tropes.fyi pattern directory https://tropes.fyi/directory (tier: community; accessed 2026-08-14) 7. vale-ai-tells, 111 machine-checkable rules https://github.com/tbhb/vale-ai-tells (tier: community; accessed 2026-08-14) ## Status history Ids are permanent. A retired tell keeps its id and its page. - 2026-08-14, Active: Wikipedia lists the construction under language and grammar with no decay note, and the copula decline is reported in two separate corpora, academic abstracts and Wikipedia articles. No published measurement shows it fading. ## License CC BY 4.0. https://creativecommons.org/licenses/by/4.0/ Attribution: The AI Tells Index, feedsquad.com/ai-tells Reuse the data, including commercially. Keep the attribution line. --- Dataset version 1.0.0. Schema version 1. Part of [FeedSquad](https://feedsquad.com). Built by [Herman Foundry](https://hermanfoundry.com) from Levi, Finnish Lapland.