LOREN: Logic Enhanced Neural Reasoning for Fact Verification Jiangjie Chen*y, Qiaoben Baoy, Jiaze Chenz, Changzhi Sunz, Hao Zhouz, Yanghua Xiaoy, Lei Liz yShanghai Key Laboratory of Data Science, School of Computer Science, Fudan University, China zByteDance AI Lab, Beijing, China fjjchen19, qbbao19,
[email protected], fchenjiaze, sunchangzhi, zhouhao.nlp,
[email protected] Abstract Claim c : The Adventures of Pluto Nash was reviewed by Ron Underwood. Given a natural language statement, how to verify whether it ① Central Stage 1: Reasoning is supported, refuted, or unknown according to a large-scale Phrase Extraction Units Construction What book was reviewed by Ron The Adventures knowledge source like Wikipedia? Existing neural-network- Underwood? or … of Pluto Nash ② based methods often regard a sentence as a whole. While Probing What did Ron Underwood do about reviewed ℛc Question The Adventures of Pluto Nash? or … we argue that it is beneficial to decompose a statement into Generation Ron Underwood Who reviewed The Adventures of multiple verifiable logical points. In this paper, we propose Pluto Nash? or … � LOREN, a novel approach for fact verification that integrates Evidence 1: The Adventures of Pluto Nash is a 2002 both LOgic guided REasoning and Neural inference. The key ⓪ E ③ Australian American science fiction action comedy film starring Evidential Evidence Eddie Murphy (in a dual role) and directed by Ron Underwood. insight of LOREN is that it decomposes a statement into mul- Retrieval Evidence 2: … Phrase tiple reasoning units around the central phrases. Instead of Calculation directly validating a single reasoning unit, LOREN turns it The Adventures The Adventures of Pluto Nash of Pluto Nash into a question-answering task and calculates the confidence ④ reviewed directed of every single hypothesis using neural networks in the em- ℛc Single Hypothesis ℛE Verification bedding space.