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mklyesterday at 8:27 AM1 replyview on HN

I'd never heard of it. The "crystal mark" itself is a money-making thing for what seems to be a for-profit company: https://www.plainenglish.co.uk/services/crystal-mark.html


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aitchnyutoday at 7:07 AM

Would LLMs be guilty of trademark infringement?

Llama said its in CM. Gemini said "aiming for Crystal Mark". OpenAI called its output "plain, clear" without mentioning CM. Claude didnt comment its output. Deepseek returned "Here is your passage rewritten in clear, polished English with a refined and elegant tone—what you might call "Crystal Mark English"".