What Do Claim Verification Datasets Actually Test? A Reasoning Trace Analysis

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Autores principales: Rao, Delip, Callison-Burch, Chris
Formato: Preprint
Publicado: 2026
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author Rao, Delip
Callison-Burch, Chris
author_facet Rao, Delip
Callison-Burch, Chris
contents Despite rapid progress in claim verification, we lack a systematic understanding of what reasoning these benchmarks actually exercise. We generate structured reasoning traces for 24K claim-verification examples across 9 datasets using GPT-4o-mini and find that direct evidence extraction dominates, while multi-sentence synthesis and numerical reasoning are severely under-represented. A dataset-level breakdown reveals stark biases: some datasets almost exclusively test lexical matching, while others require information synthesis in roughly half of cases. Using a compact 1B-parameter reasoning verifier, we further characterize five error types and show that error profiles vary dramatically by domain -- general-domain verification is dominated by lexical overlap bias, scientific verification by overcautiousness, and mathematical verification by arithmetic reasoning failures. Our findings suggest that high benchmark scores primarily reflect retrieval-plus-entailment ability. We outline recommendations for building more challenging evaluation suites that better test the reasoning capabilities verification systems need.
format Preprint
id arxiv_https___arxiv_org_abs_2604_01657
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle What Do Claim Verification Datasets Actually Test? A Reasoning Trace Analysis
Rao, Delip
Callison-Burch, Chris
Computation and Language
Despite rapid progress in claim verification, we lack a systematic understanding of what reasoning these benchmarks actually exercise. We generate structured reasoning traces for 24K claim-verification examples across 9 datasets using GPT-4o-mini and find that direct evidence extraction dominates, while multi-sentence synthesis and numerical reasoning are severely under-represented. A dataset-level breakdown reveals stark biases: some datasets almost exclusively test lexical matching, while others require information synthesis in roughly half of cases. Using a compact 1B-parameter reasoning verifier, we further characterize five error types and show that error profiles vary dramatically by domain -- general-domain verification is dominated by lexical overlap bias, scientific verification by overcautiousness, and mathematical verification by arithmetic reasoning failures. Our findings suggest that high benchmark scores primarily reflect retrieval-plus-entailment ability. We outline recommendations for building more challenging evaluation suites that better test the reasoning capabilities verification systems need.
title What Do Claim Verification Datasets Actually Test? A Reasoning Trace Analysis
topic Computation and Language
url https://arxiv.org/abs/2604.01657