Case-Based Reasoning with Language Models for Classification of Logical Fallacies

• URL: http://arxiv.org/abs/2301.11879v2
• Date: Wed, 17 May 2023 20:13:59 GMT
• Title: Case-Based Reasoning with Language Models for Classification of Logical Fallacies
• Authors: Zhivar Sourati, Filip Ilievski, H\^ong-\^An Sandlin, Alain Mermoud
• Abstract summary: We propose a Case-Based Reasoning method that classifies new cases of logical fallacy. Our experiments indicate that Case-Based Reasoning improves the accuracy and generalizability of language models.
• Score: 3.511369967593153
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The ease and speed of spreading misinformation and propaganda on the Web motivate the need to develop trustworthy technology for detecting fallacies in natural language arguments. However, state-of-the-art language modeling methods exhibit a lack of robustness on tasks like logical fallacy classification that require complex reasoning. In this paper, we propose a Case-Based Reasoning method that classifies new cases of logical fallacy by language-modeling-driven retrieval and adaptation of historical cases. We design four complementary strategies to enrich input representation for our model, based on external information about goals, explanations, counterarguments, and argument structure. Our experiments in in-domain and out-of-domain settings indicate that Case-Based Reasoning improves the accuracy and generalizability of language models. Our ablation studies suggest that representations of similar cases have a strong impact on the model performance, that models perform well with fewer retrieved cases, and that the size of the case database has a negligible effect on the performance. Finally, we dive deeper into the relationship between the properties of the retrieved cases and the model performance.

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