REV: Information-Theoretic Evaluation of Free-Text Rationales Hanjie Chen author Faeze Brahman author Xiang Ren author Yangfeng Ji author Yejin Choi author Swabha Swayamdipta author 2023-07 text Proceedings of the 61st Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers) Anna Rogers editor Jordan Boyd-Graber editor Naoaki Okazaki editor Association for Computational Linguistics Toronto, Canada conference publication chen-etal-2023-rev 10.18653/v1/2023.acl-long.112 https://aclanthology.org/2023.acl-long.112/ 2023-07 2007 2030