Someone who genuinely believes AI is about to kill everyone — that ASI will arrive, fail to align, and cause human extinction. Often associated with LessWrong, MIRI, and the rationalist diaspora. Treated with mixed seriousness in mainstream tech.
Half the people you meet at AI conferences are doomers — the other half are the ones doomers are worried about.
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The vocabulary of software engineers, AI researchers, and anyone living in a terminal or on GitHub — from LLM to MCP, CORS to vibe coding, agentic to enshittification.
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