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Observer Zero: an instrumented artificial world for studying scientific belief revision in autonomous LLM agents
Nick Lamb | Published Thursday, August 13, 2026Meridian is a deterministic artificial world in which autonomous LLM scientist agents run
experiments on instruments, exchange letters, and maintain explicit probabilistic beliefs, while
a physical constant changes covertly mid-run. The true state is known only to the simulator, so
whether anyone notices becomes a measurement rather than an interpretation.
The platform separates three things that are usually confounded: what could have been known from
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Under development.