Guides
What is actually known about AI text watermarking, invisible unicode, and the punctuation that gives machine writing away.
Em Dash vs En Dash vs Hyphen
The difference between the em dash, en dash and hyphen, when to use each, and how to type them on Mac and Windows.
How to Type an Em Dash (—)
Every em dash shortcut: Mac (Option+Shift+-), Windows (Alt+0151), Word, Google Docs, iPhone, Linux and HTML.
Why Does AI Use So Many Em Dashes?
ChatGPT and Claude overuse the em dash badly. The real reason it happens, why it signals AI writing, and how to fix it.
Does ChatGPT Watermark Its Text?
OpenAI built a ChatGPT text watermark and never shipped it. What is confirmed, what is myth, and how to check your text.
Does Claude Watermark Its Text?
Since August 2026 Claude embeds a watermark in all generated text, worldwide. What it is, what it proves, what removes it.
Invisible Unicode Characters Explained
A reference to invisible unicode — zero-width spaces, joiners, bidi marks and lookalike spaces — with code points and fixes.