"Dead Internet Theory" refers to the conspiracy theory, originating on 4chan's conspiracy board, that large portions of the internet are generated by an AI instead of humans. Adherents to the theory believe that replacing most of the internet with AI-generated content has been a long-term project of the intelligence agencies of major world governments, with the purpose to control the popular discourse and to render most of the population docile.

While this theory is widely dismissed due to the historic technological impossibility of widespread AI content generation, there is some fear that it may become real with the recent rise of large language model based chatbots.
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