[Submitted on 4 Nov 2026]
Title:Follow the Policy, Fail the Benchmark: Auditing and Revising Policy-Based Decision Benchmarks
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Abstract:Policy-based decision benchmarks evaluate whether systems apply written rules to financial and operational cases. Yet a rule-following response can be marked wrong when the benchmark misstates the required decision. We audit nine public policy-based decision benchmarks through source tracing, program execution, and controlled checks. We find unsupported targets, reference errors that survive replay or propagate as solved steps, and evaluators that reject acceptable answers or credit incomplete decisions. To measure the scoring impact, we rescore unchanged model responses. On the 96 LegalBench SARA numeric cases, correcting the scorer raises acceptance by more than 80 percentage points for each of three models, without changing references or responses. In RuleArena Tax, restoring a required zero floor changes 27 of 300 references and narrows an observed model gap. A controlled federal-exemption task with explicit ownership and eligibility assumptions also shows that errors in supplied intermediate answers can affect final decisions. We present BAR (Benchmark Audit and Revision), a versioned collection of audit evidence and revisions for reevaluation.
Comments: 28 pages. Code and revised data: this https URL
Subjects:
Computation and Language (cs.CL); Software Engineering (cs.SE)
Cite as: arXiv:2611.07042 [cs.CL]
(or arXiv:2611.07042v1 [cs.CL] for this version)
https://doi.org/10.48550/arXiv.2611.07042
arXiv-issued DOI via DataCite (pending registration)
Submission history
From: Yanru Xiao [view email] [v1] Wed, 4 Nov 2026 19:04:55 UTC (136 KB)
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