this post was submitted on 14 Aug 2026
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Unless I missed something, that seems pretty brittle. Wouldn't any minor editing break it because the watermark is derived from the preceding text? Eg. Find + replace "it is" to "it's"
The section "4. What editing does to the mark" talks about that. Probably best to look at that illustration again, but basically those edits would interrupt consecutive runs of detectable text, but if a run is long enough, it can still be detected with statistical significance.
So, it doesn't have to check the 'color' of the words from start to end uninterrupted, but rather can also detect color sequences in the middle of the text.
Yes you missed at least one whole section including a graphic that shows the breakdown of the watermark with typo fixing, light paraphrasing, moderate and heavy editing.