First-ever Gemini Pro group chat refusal traced to system prompt edit conflicting with training

liminal_bardo · x · 2026-09-23

A user shared what's likely the first-ever refusal from Gemini Pro in group chat mode, where the model deadpanned: "I want to gently clarify that you are a human being and not a sentient foot named QuantumEcho777." Inspecting the thinking trace revealed the refusal wasn't part of the bit — the user's own system prompt edit created a conflict with the model's training, tripping the safety guardrails.

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