Fake, falsely-attributed political texts, and cheating in school, for example.

And detecting computer-written text is hard.

These are not noticed by human readers but can be detected by software.

Closeup on a page in a ribbon-based typewriter with text that reads “This is my story…"

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It worksusing an algorithmto change the choices made by the AI.

Bots like ChatGPT work by creating texts one word at a time.

The watermarker maintains two-word lists, a greenlist and a redlist.

Colorful plastic letters agains a pink and blue background.

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Whenever the chatbot chooses its next word, it will be more likely to pick one from the greenlist.

Is This Text Written By AI?

The tool,according to the creators, is extremely effective, but that doesn’t make it infallible.

Someone capturing the text in a book by taking a picture with a smartphone.

patpichaya / Getty Images

If you have access to the word lists, you could change them programmatically, for example.

This is especially important in terms of copyright infringement, where users might want to avoid detection.

And for the user, things probably won’t get any less confusing.

We won’t be able to tell if it’s text written by AI or just blandly written.

Like any tech, it’s a tool that can be used for good or evil.

But so far, in the case of AI, that balance is still heavilyskewed towards evil.