Challenge: Existing studies on fact verification have failed to fully exploit question structures and ignoring relevant label information during the verification process.
Approach: They propose a new approach for question-answering dialogue based fact verification using label-infused iterative information interacting.
Outcome: The proposed approach achieves remarkable performance on HEALTHVER, FAVIQ, and COLLOQUIAL.

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Exploring Listwise Evidence Reasoning with T5 for Fact Verification (2021.acl-short)

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Challenge: Existing methods for fact verification use pretrained sequence-to-sequence transformers for sentence selection and label prediction.
Approach: They propose a framework for fact verification that leverages pretrained sequence-to-sequence transformer models for sentence selection and label prediction.
Outcome: The proposed framework scores higher than the second place approach on the blind test set . the proposed framework can be useful for a broader range of NLP tasks, the authors say .
FIRE: Fact-checking with Iterative Retrieval and Verification (2025.findings-naacl)

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Challenge: Fact-checking long-form text is challenging, and breaking it down into multiple atomic claims is not cost-effective.
Approach: They propose a novel agent-based framework that integrates evidence retrieval and claim verification in an iterative manner.
Outcome: The proposed framework reduces large language model (LLM) costs by an average of 7.6 times and search costs by 16.5 times while retaining the same performance.
Natural Logic-guided Autoregressive Multi-hop Document Retrieval for Fact Verification (2022.emnlp-main)

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Challenge: Recent evidence retrieval approaches rely on heuristics and assume hyperlinks between documents.
Approach: They propose a retrieval method that combines a retriever and a proof system that reranks documents and reorders them .
Outcome: The proposed method exceeds or is on par with the current state-of-the-art on FEVER, HoVer and FEVEROUS-S while using 5 to 10 times less memory than competing systems.
QA-NatVer: Question Answering for Natural Logic-based Fact Verification (2023.emnlp-main)

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Challenge: Recent work has focused on natural logic, which operates directly on natural language by capturing the semantic relation of spans between an aligned claim and its evidence via set-theoretic operators.
Approach: They propose to use question answering to predict natural logic operators using generalization capabilities of instruction-tuned language models.
Outcome: The proposed approach outperforms the best baseline on a Danish verification dataset by 4.3 accuracy points.
FRVA: Fact-Retrieval and Verification Augmented Entailment Tree Generation for Explainable Question Answering (2024.findings-acl)

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Challenge: Existing methods for generating a entailment tree exhibit the reasoning chains from knowledge facts to predicted answers, but they have large fact search spaces and error accumulation problems resulting in the generation of invalid steps.
Approach: They propose a Fact-Retrieval and Verification Augmented bidirectional entailment tree generation method that contains two systems.
Outcome: The proposed method outperforms existing models and achieves state-of-the-art performance in fact selection and structural correctness.
Unsupervised Question Answering for Fact-Checking (D19-66)

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Challenge: Recent Deep Learning (DL) models have achieved human-level accuracy on natural language tasks such as question-answering, natural language inference, and textual entailment.
Approach: They propose an unsupervised question-answering based approach for a similar task, fact-checking.
Outcome: The proposed approach achieves label accuracy of 80.2% on the development set and 80.25% on the test set.
FaGANet: An Evidence-Based Fact-Checking Model with Integrated Encoder Leveraging Contextual Information (2024.lrec-main)

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Challenge: Existing evidence-based fact-checking efforts are time-consuming and challenging . however, relying on surface patterns of claims makes it difficult to identify subtle connections between claims and evidence.
Approach: They propose a model that leverages sentence-level attention and graph attention network to enhance accuracy and fusing claims and evidence information for accurate identification of even well-disguised data.
Outcome: The proposed model improves accuracy and state-of-the-art in the evidence-based fact-checking task.
ProoFVer: Natural Logic Theorem Proving for Fact Verification (2022.tacl-1)

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Challenge: Recent fact verification systems rely on neural network classifiers for veracity prediction, which lack explainability.
Approach: They propose a model that generates natural logic-based inferences as proofs using lexical mutations between spans in the claim and the evidence retrieved.
Outcome: The proposed model has highest label accuracy and second best score in the FEVER leaderboard.
Interpretable Proof Generation via Iterative Backward Reasoning (2022.naacl-main)

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Challenge: Existing proof generation tasks require reasoning capabilities, but they usually just request for an answer without the reasoning procedure that would make it interpretable.
Approach: They propose an iterative backward reasoning model to solve the proof generation tasks on rule-based Question Answering.
Outcome: The proposed model improves in-domain performance and cross-domain transferability over existing models.
ClaimVer: Explainable Claim-Level Verification and Evidence Attribution of Text Through Knowledge Graphs (2024.findings-emnlp)

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Challenge: Despite the fact that many fact-checking tools lack granularity and explainability, they lack the ability to be useful in various contexts.
Approach: They propose a text validation framework that provides granular explanations for each claim and localizes the specific problematic content to reduce cognitive load.
Outcome: The proposed framework provides granular explanations for each claim prediction and localizes and educates users on the specific content.

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