Claim verification based on factual evidence can become substantially difficult when the proof comprises several sentences, making it challenging for natural language processing (NLP) models to comprehend long-range dependencies. Inspired by the success of prompt learning in numerous NLP applications, in this paper, we introduce prompt learning for the multi-hop claim verification task. With extensive experiments, we achieve promising results using our proposed prompt-based method that leverages manually constructed prompts. By fine-tuning the language models with prompts, we have achieved an accuracy of 83.9% while obtaining an improved cross-domain generalization performance as well. Moreover, we conducted experiments in few-shot and zero-shot settings and obtained significantly better performance using prompt-based methods compared to traditional supervised learning techniques that are based on the fine-tuning paradigm to further demonstrate the effectiveness of prompt learning in claim verification.
Article ID: 2023L6
Publisher: Canadian Artificial Intelligence Association