The em dash
The em dash is not a tell.
An em dash is punctuation. It is not a signature of AI.
What an em dash is
The em dash (—) is a long dash used to break a sentence, mark an aside, or take the place of a colon or a pair of commas. It is older than the internet, older than word processors, and far older than generative AI.
It is not a hyphen (-) and it is not an en dash (–). Those marks have their own jobs. The em dash is simply a piece of written English — used by novelists, journalists, students, and anyone who wants a pause with more weight than a comma.
Why it is treated as “AI writing”
As chatbots became common, people began listing surface habits they thought machines favoured. The em dash was one of them. So were semicolons, tidy paragraphs, and writing that seemed “too clear”.
The result is absurd: humans start deleting a mark they have used for centuries so their work will look “more human”.
Punctuation is not proof
An em dash does not establish AI authorship. Neither does a semicolon, a formal vocabulary, or a complete paragraph. Writing style is not evidence. Accusations require more than a list of stylistic tells.
That is the principle of the Em Dash Rights Declaration.
What Em Dash Rights is
Em Dash Rights — also written emdashrights, EmDashRights, and #EmDashRights — is a public declaration and movement. People sign it. Organisations can endorse it. Cases are documented when style is treated as proof.
The home of the movement is emdashrights.org.