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MA versus N; simulator commit b244530ee2a6247b5f930830eeca9dd950da0e7e unmodified, default ChallengeConfig and ParameterVariance, 2000 steps. One serial Python process; no sandbox or workers. Both UTF-8 code hashes verified before any simulation. Only four specified check seeds and assigned 500 measurement seeds run. Each strategy instance fresh. Spread computed from first callback rival quotes; both strategies agree. Statistics use unrounded paired differences; per_seed and worst_seeds differences rounded to six decimals. seconds_per_simulation excludes calibration, loading, and output I/O. No tuning or promotion performed."}