# Tricolon and rule-of-three lists > Source-anchored research for Tricolon and rule-of-three lists. Run status: COMPLETED. Parent: [LLM rhetorical-pattern tells in prose](https://llms-explorer.com/tree/ai-isms-rhetorical-tells/) · 2 facets · 4 facts · page: https://llms-explorer.com/tree/tricolon-and-rule-of-three-lists/ ## Definitions - Tricolon is not proof of AI authorship: corporate communications, grant applications and student essays show the same habit, and prompting can remove the tell; the signal is cumulative with other tells. (medium confidence) (verified as of 2026-02-13) — [source](https://www.cherryleaf.com/2026/02/indicators-that-suggest-something-was-written-by-ai/) ## Facts and statements - Wikipedia's Signs of AI writing guide says LLMs overuse the rule of three in forms from adjective-adjective-adjective to short phrase, short phrase, and short phrase, often to make superficial analyses look more comprehensive. (medium confidence) — [source](https://en.wikipedia.org/wiki/Wikipedia:Signs_of_AI_writing) - Proposed explanation: LLMs reproduce a technique that is effective in human rhetoric (e.g. 'I came, I saw, I conquered') but lack the judgment to hold back, so saturation dulls the effect. (medium confidence) — [source](https://www.deadlanguagesociety.com/p/rhetorical-analysis-ai) - Heuristic: if nearly every enumeration in a paragraph comes in threes, the text is likely AI output; humans break the pattern with two, four, or long lists. (medium confidence) — [source](https://www.cherryleaf.com/2026/02/indicators-that-suggest-something-was-written-by-ai/)