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EleutherAI

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Representative Papers

Faults in Our Formal Benchmarking: Dataset Defects and Evaluation Failures in Lean Theorem Proving

Jun 28, 2026

This work addresses critical reliability issues in existing Lean theorem-proving benchmarks, where inconsistencies between formal statements and informal problem descriptions, along with susceptibility to trivial or adversarial solutions, undermine evaluation validity. To tackle this, the study introduces the first fault taxonomy for formal mathematical datasets and develops an automated auditing toolkit integrating static program analysis, formal verification, semantic auditing via prompt engineering, and manual validation. Applying this framework, the authors conduct a large-scale audit of five prominent benchmarks, uncovering 4,833 issues—including 398 severe defects—and demonstrate that uncorrected flaws significantly distort prover rankings. The paper releases both the auditing tools and corrected dataset snapshots to foster reproducible and trustworthy evaluations in theorem proving.

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Latest Papers

Faults in Our Formal Benchmarking: Dataset Defects and Evaluation Failures in Lean Theorem Proving

Jun 28, 2026

This work addresses critical reliability issues in existing Lean theorem-proving benchmarks, where inconsistencies between formal statements and informal problem descriptions, along with susceptibility to trivial or adversarial solutions, undermine evaluation validity. To tackle this, the study introduces the first fault taxonomy for formal mathematical datasets and develops an automated auditing toolkit integrating static program analysis, formal verification, semantic auditing via prompt engineering, and manual validation. Applying this framework, the authors conduct a large-scale audit of five prominent benchmarks, uncovering 4,833 issues—including 398 severe defects—and demonstrate that uncorrected flaws significantly distort prover rankings. The paper releases both the auditing tools and corrected dataset snapshots to foster reproducible and trustworthy evaluations in theorem proving.

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