Real-time Fake News from Adversarial Feedback

• URL: http://arxiv.org/abs/2410.14651v1
• Date: Fri, 18 Oct 2024 17:47:11 GMT
• Title: Real-time Fake News from Adversarial Feedback
• Authors: Sanxing Chen, Yukun Huang, Bhuwan Dhingra,
• Abstract summary: We show that evaluations for fake news detection based on conventional sources, such as claims on fact-checking websites, result in an increasing accuracy over time for LLM-based detectors. This suggests that popular political claims, which form the majority of fake news on such sources, are easily classified using surface-level shallow patterns. We develop a novel pipeline that leverages natural language feedback from a RAG-based detector to iteratively modify real-time news into fake news.
• Score: 11.742257531343814
• License:
• Abstract: We show that existing evaluations for fake news detection based on conventional sources, such as claims on fact-checking websites, result in an increasing accuracy over time for LLM-based detectors -- even after their knowledge cutoffs. This suggests that recent popular political claims, which form the majority of fake news on such sources, are easily classified using surface-level shallow patterns. Instead, we argue that a proper fake news detection dataset should test a model's ability to reason factually about the current world by retrieving and reading related evidence. To this end, we develop a novel pipeline that leverages natural language feedback from a RAG-based detector to iteratively modify real-time news into deceptive fake news that challenges LLMs. Our iterative rewrite decreases the binary classification AUC by an absolute 17.5 percent for a strong RAG GPT-4o detector. Our experiments reveal the important role of RAG in both detecting and generating fake news, as retrieval-free LLM detectors are vulnerable to unseen events and adversarial attacks, while feedback from RAG detection helps discover more deceitful patterns in fake news.

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