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arXiv · 2502.11753

HintsOfTruth: A Multimodal Checkworthiness Detection Dataset with Real and Synthetic Claims

Abstract

Misinformation can be countered with fact-checking, but the process is costly and slow. Identifying checkworthy claims is the first step, where automation can help scale fact-checkers' efforts. However, detection methods struggle with content that is (1) multimodal, (2) from diverse domains, and (3) synthetic. We introduce HintsOfTruth, a public dataset for multimodal checkworthiness detection with 27K real-world and synthetic image/claim pairs. The mix of real and synthetic data makes this dataset unique and ideal for benchmarking detection methods. We compare fine-tuned and prompted Large Language Models (LLMs). We find that well-configured lightweight text-based encoders perform comparably to multimodal models but the former only focus on identifying non-claim-like content. Multimodal LLMs can be more accurate but come at a significant computational cost, making them impractical for large-scale applications. When faced with synthetic data, multimodal models perform more robustly.

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Michiel van der Meer, Pavel Korshunov, Sébastien Marcel, Lonneke van der Plas. 2025-02-17. HintsOfTruth: A Multimodal Checkworthiness Detection Dataset with Real and Synthetic Claims. https://arxiv.org/abs/2502.11753

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