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this post was submitted on 16 Jan 2026
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https://en.wikipedia.org/wiki/Markov_chain
Before the advent of AI, I wrote a slack bot called slackbutt that made Markov chains of random lengths between 2 and 4 out of the chat history of the channel. It was surprisingly coherent. Making an "llm" like that would be trivial.
Reddit has at least one sub where the posts and the comments are generated by Markov-chain bots. More than a few times I've gotten a post from there in my feed, and read through it confusedly for several minutes before realizing. Iirc it's called subreddit_simulator.
The original subreddit simulator ran on simple Markov chains.
Subreddit simulator GPT2 used GPT2, and was already so spookily accurate that IIRC its creators specifically said they wouldn't create one based on GPT3 out of fear that people wouldn't be able to tell the difference between real and not generated content