A new stratified per-question probability-gap metric shows that existing contamination mitigation strategies overstate restoration, and a step-wise decoding cap (RailCap) achieves the lowest measured gap.
LNE -Blocking: An Efficient Framework for Contamination Mitigation Evaluation on Large Language Models
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Zero Gap Is Not Restoration: Stratified Per-Question Probability Evaluation and Step-wise Mitigation of Benchmark Contamination
A new stratified per-question probability-gap metric shows that existing contamination mitigation strategies overstate restoration, and a step-wise decoding cap (RailCap) achieves the lowest measured gap.