Resolves YES if
The Qin dynasty's central government is overthrown — defined as the surrender or assassination of Qin's last reigning sovereign — at any time before
BC-205 / 12 / 31, as determined by the simulation's Y-detection rules.
- Multi-agent replay runs always-on with 1,000 named agents (10 A-tier · 26 B-tier · ≈964 stochastic).
- Y is detected when the hard rule (surrender / assassination) fires AND the LLM judge confirms regime collapse.
- Market resolves the instant Y is detected — not at fixed close.
- If Y has not triggered by the BC-205 window end, resolves NO.