# Significance inflation (underscores the importance) 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: underscores-the-importance - Category: Lexical (lexical) - Subcategory: importance-assertion - Also known as: underscores the importance, highlights its significance, emphasizes the importance, WP:AILEGACY, emphasising its significance, highlighting the importance of, underscores the need - Status: Active. Currently signals low-effort writing. - Severity: medium - Evidence grade: peer-reviewed (a published study measures the pattern) - Languages: en - Added: 2026-08-14 - Updated: 2026-08-17 - Page: https://feedsquad.com/ai-tells/underscores-the-importance ## Description A verb of emphasis bolted to an abstract noun of importance. The sentence asserts that something matters without saying to whom, by how much, or on whose account. Kobak measured underscores at about nine times its extrapolated pre-2022 baseline in biomedical abstracts, and Juzek and Ward list underscore among their 21 focal overrepresented words. Wikipedia files the exact phrasing under undue emphasis on significance and legacy. ## Why it reads as machine-written It is a claim about a claim. Nothing in the clause can be checked, so nothing in it can be wrong. Models produce it when the retrieved material will not support a specific statement, which is the same moment a human writer would stop and go find one. ## 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(?:underscor(?:e|es|ed|ing)|highlight(?:s|ed|ing)?|emphasi[sz](?:e|es|ed|ing))\s+(?:the|its|their)\s+(?:importance|significance)\b ``` Flags: gi ## Examples Constructed specimens. Written for this index. Never quoted from anyone's posts. ### Specimen 1 Before, exhibiting the tell: > The launch underscores the importance of community feedback in modern product development. Teams that listen to their users early tend to build products those users stay with, and the ones that skip that step usually learn the same lesson later and at greater cost. Feedback is only valuable when someone acts on it. After, repaired: > Fourteen people in the beta channel asked for keyboard shortcuts before we had built any. We shipped the shortcuts first and the settings page second because of those fourteen messages. Note: Importance is not a property of the launch. It is a verdict the reader is asked to accept on no evidence. The repair names who said what and what changed because of it. ## False positives Who legitimately writes this way. Grant writers and science journalists write this sentence for a living, and it is house style in research-institution press releases and in the discussion section of medical papers. Reinhart and colleagues found that LLM prose sits closest to the dense academic register, which means a genuinely academic human writer matches this profile far more often than a blogger does. The pattern requires an emphasis object for a reason: underscore also names a typographic mark and a piece of incidental music, and Wikipedia flags both senses. ## Model attribution Wikipedia's editor-maintained era buckets place emphasizing and highlighting in current output and underscore in Grok's. That periodisation is observation by editors rather than measurement, and should be read as a hypothesis about drift. ## Platform notes - wikipedia: Filed under undue emphasis on significance, legacy and broader trends. Shortcut WP:AILEGACY. - google: Google's helpful-content guidance asks whether a page provides original information, reporting, research or analysis. A sentence that asserts importance and supplies no evidence is the shape that question is written to catch. ## Sources 1. Kobak et al., arXiv HTML v1: excess frequency ratio for underscores https://arxiv.org/html/2406.07016v1 (tier: primary-doc; accessed 2026-08-14) 2. Juzek and Ward: Why Does ChatGPT Delve So Much? Exploring the Sources of Lexical Overrepresentation in LLMs (COLING 2025) https://arxiv.org/abs/2412.11385 (tier: peer-reviewed; accessed 2026-08-14) 3. Wikipedia: Signs of AI writing, section on undue emphasis on significance, legacy and broader trends https://en.wikipedia.org/wiki/Wikipedia:Signs_of_AI_writing (tier: community; accessed 2026-08-14) 4. Reinhart et al.: Do LLMs write like humans? PNAS 122(8) (PubMed Central copy) https://pmc.ncbi.nlm.nih.gov/articles/PMC11874169/ (tier: peer-reviewed; accessed 2026-08-14) 5. Google Search Central: Creating helpful, reliable, people-first content https://developers.google.com/search/docs/fundamentals/creating-helpful-content (tier: primary-doc; accessed 2026-08-14) 6. Kobak et al.: Delving into LLM-assisted writing in biomedical publications, Science Advances 11(27) https://www.science.org/doi/10.1126/sciadv.adt3813 (tier: peer-reviewed; accessed 2026-08-14) 7. Reinhart et al.: Do LLMs write like humans? (arXiv:2410.16107) https://arxiv.org/abs/2410.16107 (tier: peer-reviewed; accessed 2026-08-14) ## Status history Ids are permanent. A retired tell keeps its id and its page. - 2026-08-14, Active: Wikipedia's era buckets keep emphasizing and highlighting in the mid-2025 onward set, and record that Grok still overuses underscore as of 2026. No source reports the phrasing declining. ## 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.