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arXiv 2310.07613cs.AIcs.CY
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基于强化学习的知识图谱推理用于可解释的事实核查

Reinforcement Learning-based Knowledge Graph Reasoning for Explainable Fact-checking

University of Tartu(塔尔图大学);Outplay(Outplay公司);IIIT-Delhi(德里印度理工学院信息技术学院)

Gustav Nikopensius, Mohit Mayank, Orchid Chetia Phukan, Rajesh Sharma

AI总结:

针对事实核查缺乏可解释性,提出基于强化学习的知识图谱推理方法,通过路径生成与投票机制提供人类可读证据,提升核查可信度。

摘要:

事实核查是一项至关重要的任务,因为它有助于防止错误信息的传播。然而,人工事实核查无法跟上虚假信息在线生成和传播的速度。机器自动化事实核查比人工核查显著更快。但为了增强这些自动化系统的可信度和透明度,在事实核查过程中需要可解释性。事实核查通常需要将事实断言与知识体系进行对比以生成此类解释。表示知识的有效方式是知识图谱(KG)。已有大量关于利用知识图谱进行事实核查的研究工作,但在这些场景中应用强化学习(RL)的关注较少。为弥补这一差距,我们提出了一种基于强化学习的知识图谱推理方法,用于可解释的事实核查。在FB15K-277和NELL-995数据集上的大量实验表明,在知识图谱上进行推理是生成人类可读的、以路径和分类形式呈现的事实声明解释的有效方式。强化学习推理智能体计算一条路径,该路径要么证明要么反驳某个事实声明,但本身不提供裁决。裁决由投票机制达成,该机制利用智能体生成的路径。这些路径可以呈现给人类读者,以便他们自行判断所提供的证据是否具有说服力。这项工作将鼓励在该方向上进一步研究,将强化学习应用于可解释的事实核查,因为它通过提供人在回路的方法增加了可信度。

英文摘要:

Fact-checking is a crucial task as it ensures the prevention of misinformation. However, manual fact-checking cannot keep up with the rate at which false information is generated and disseminated online. Automated fact-checking by machines is significantly quicker than by humans. But for better trust and transparency of these automated systems, explainability in the fact-checking process is necessary. Fact-checking often entails contrasting a factual assertion with a body of knowledge for such explanations. An effective way of representing knowledge is the Knowledge Graph (KG). There have been sufficient works proposed related to fact-checking with the usage of KG but not much focus is given to the application of reinforcement learning (RL) in such cases. To mitigate this gap, we propose an RL-based KG reasoning approach for explainable fact-checking. Extensive experiments on FB15K-277 and NELL-995 datasets reveal that reasoning over a KG is an effective way of producing human-readable explanations in the form of paths and classifications for fact claims. The RL reasoning agent computes a path that either proves or disproves a factual claim, but does not provide a verdict itself. A verdict is reached by a voting mechanism that utilizes paths produced by the agent. These paths can be presented to human readers so that they themselves can decide whether or not the provided evidence is convincing or not. This work will encourage works in this direction for incorporating RL for explainable fact-checking as it increases trustworthiness by providing a human-in-the-loop approach.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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