For me, the best indicator if a post is AI-generated is if it is written in flawless English. Even the best posters who are native English speakers don't necessarily write every post using the precision in punctuation, spelling & grammar executed by ChatGPT. If a user's native language isn't English (as can be evidenced by their posting history), and they suddenly start posting in flawless English, it means one of two things:
1. The text is plagiarized, or
2. The text is AI-generated.
That's right, The easiest indicators to know an article was made with AI is the perfection of the language. (maybe a typo is important so it's not considered AI generated)

However, if you copy paste and it is detected by an AI detector the result is the AI generated. AI detector can only show AI generated or not, but cannot detect plagiarism. Must be done 2 times. with AI generated and plagiarized text
AI generated is still not accurate. AI and AI generated are still in the development stage.
AI is still in the development stage, it's already troublesome, especially if AI technology is getting more sophisticated. Maybe we'll be eliminated.
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