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Won't Get Fooled Again: Answering Questions with False Premises by Hu, Shengding; Luo, Yifan; Wang, Huadong; Cheng, Xingyi; Liu, Zhiyuan; Sun, Maosong is a scholarly article available to read on EtoBox.

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Pre-trained language models (PLMs) have shown unprecedented potential in various fields, especially as the backbones for question-answering (QA) systems. However, they tend to be easily deceived by tricky questions such as "How many eyes does the sun have?". Such frailties of PLMs often allude to the lack of knowledge within them. In this paper, we find that the PLMs already possess the knowledge required to rebut such questions, and the key is how to activate the knowledge. To systematize this observation, we investigate the PLMs' responses to one kind of tricky questions, i.e., the false premises questions (FPQs). We annotate a FalseQA dataset containing 2365 human-written FPQs, with the corresponding explanations for the false premises and the revised true premise questions. Using FalseQA, we discover that PLMs are capable of discriminating FPQs by fine-tuning on moderate numbers (e.g., 256) of examples. PLMs also generate reasonable explanations for the false premise, which serve as rebuttals. Further replaying a few general questions during training allows PLMs to excel on FPQs and general questions simultaneously. Our work suggests that once the rebuttal ability is stimulated

Author

Hu, Shengding; Luo, Yifan; Wang, Huadong; Cheng, Xingyi; Liu, Zhiyuan; Sun, Maosong

Published

2023

Language

EN