SGRC — Selective Partition Repair
Recovering useful group-relative training signals from verifier false negatives.
Selective Partition Repair for Group-Relative Policy Optimization studies hidden correctness partitions in all-rejected rollout groups. Under review at ICLR 2027.
- Score complete correctness masks jointly, rather than treating verdicts as independent decisions.
- Apply a frozen predictor and confidence gate to selectively repair group partitions.
- Retain uncertain rewards and leave the GRPO normalizer and policy objective unchanged.
The research distinguishes full-system training gains from held-out partition-recovery diagnostics.