arXiv AI By Marc Bara

Epistemic Sybil Resistance: Multiplying AI Agents Without Multiplying Evidence

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The paper introduces the concept of an epistemic Sybil problem in multi‑agent AI systems, where multiple agents may produce seemingly independent reports that actually stem from the same underlying evidence. It formalizes this issue using information‑theoretic measures and demonstrates through large‑scale experiments that naive aggregation of replicated reports can severely degrade inference accuracy unless the system accounts for shared evidence ancestry and correlated extraction errors. The study shows that aggregators that track evidential dependence rather than merely report multiplicity or similarity achieve better calibration and inference performance.

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