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Comment by BoppreH | Hacker News Reader

OP, did you use OCR or find/replace on this email? Every occurrence of "OpenAI" in their message ends in lowercase L, as in OPENAL (with an amusing exception of the name in quotes). That includes the email to reply to.

Also, I'm pretty sure you can't claim trademark infringement for an empty page and a domain made of generic words, because trademarks are limited to context.

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Yes I used OCR on the screenshot of the email they sent.

That seems like a lot of extra unnecessary effort for copy/paste-able plaintext.

Plain Text > Screenshot -> OCR -> Plain Text can be used for avoiding some sorts of identifiers hidden in text.

Yes. It just makes the text harder to read for no good reason. It’s plain-text – not an uploaded Word document or PDF with lots of hidden metadata.

Even plain text can contain hidden metadata.

I think you're confusing text documents like PDF or word .doc(x) type files for "plain text". Plain text doesn't contain hidden anything at all. It's just plain text and nothing else. That's why a plain text editor is completely different from Microsoft Word, or OpenOffice. They both edit textual document types, but a plain text editor doesn't do metadata, fancy fonts, colors, styles, or any of the fun junk you find in PDF and other textual document types. It does only text.

No, I think they were referring to plaintext.

https://www.soscisurvey.de/tools/view-chars.php

I know what "plain text" is and even so, it can contain identifiable markers, if you want to track down a leak let's say.

"Something 𝗌omething will launched on Novemᖯer 3rd"

This "plain text" string has two markers that aren't actually ascii, `𝗌` and `ᖯ`. By changing the markers for each person you send it, you might be able to track down who is leaking things, if they're careless and just copy-paste stuff that look like plaintext but actually isn't.

Anything that is a homoglyph (https://en.wikipedia.org/wiki/Homoglyph) can be used in this manner

"Plain" text can contain hidden characters such as zero width spaces which won't be visible to someone reading it but could be used for identification purposes.

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