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Large Language Models have demonstrated remarkable capabilities across diverse tasks, yet they frequently generate hallucinations outputs that are fluent but factually incorrect or unsupported. We propose Counterfactual Probing, a novel…

Computation and Language · Computer Science 2025-08-05 Yijun Feng

The use of large language models (LLMs) has significantly increased since the introduction of ChatGPT in 2022, demonstrating their value across various applications. However, a major challenge for enterprise and commercial adoption of LLMs…

Computation and Language · Computer Science 2024-08-28 N. E. Kriman

Knowledge Graphs (KGs) store structured factual knowledge by linking entities through relationships, crucial for many applications. These applications depend on the KG's factual accuracy, so verifying facts is essential, yet challenging.…

Databases · Computer Science 2026-02-12 Farzad Shami , Stefano Marchesin , Gianmaria Silvello

Large Language Models (LLMs) have inherent limitations of faithfulness and factuality, commonly referred to as hallucinations. Several benchmarks have been developed that provide a test bed for factuality evaluation within the context of…

Computation and Language · Computer Science 2025-10-24 Ernests Lavrinovics , Russa Biswas , Katja Hose , Johannes Bjerva

Retrieval-augmented generation (RAG) has become a main technique for alleviating hallucinations in large language models (LLMs). Despite the integration of RAG, LLMs may still present unsupported or contradictory claims to the retrieved…

Computation and Language · Computer Science 2024-05-20 Cheng Niu , Yuanhao Wu , Juno Zhu , Siliang Xu , Kashun Shum , Randy Zhong , Juntong Song , Tong Zhang

The rapid development of social platforms exacerbates the dissemination of misinformation, which stimulates the research in fact verification. Recent studies tend to leverage semantic features to solve this problem as a single-hop task.…

Computation and Language · Computer Science 2025-03-12 Han Cao , Lingwei Wei , Wei Zhou , Songlin Hu

The advent of Large Language Models (LLMs) has significantly transformed the AI landscape, enhancing machine learning and AI capabilities. Factuality issue is a critical concern for LLMs, as they may generate factually incorrect responses.…

Computation and Language · Computer Science 2024-04-02 Xiaoze Liu , Feijie Wu , Tianyang Xu , Zhuo Chen , Yichi Zhang , Xiaoqian Wang , Jing Gao

Detecting hallucinations in large language model (LLM) outputs is pivotal, yet traditional fine-tuning for this classification task is impeded by the expensive and quickly outdated annotation process, especially across numerous vertical…

Artificial Intelligence · Computer Science 2024-07-09 Dongxu Zhang , Varun Gangal , Barrett Martin Lattimer , Yi Yang

Fake news detection methods based on writing style have achieved remarkable progress. However, as adversaries increasingly imitate the style of authentic news, the effectiveness of such approaches is gradually diminishing. Recent research…

Artificial Intelligence · Computer Science 2025-11-14 Jing He , Han Zhang , Yuanhui Xiao , Wei Guo , Shaowen Yao , Renyang Liu

Recent research on query generation has focused on using Large Language Models (LLMs), which despite bringing state-of-the-art performance, also introduce issues with hallucinations in the generated queries. In this work, we introduce…

Computation and Language · Computer Science 2024-10-16 Zhongxiang Sun , Zihua Si , Xiaoxue Zang , Kai Zheng , Yang Song , Xiao Zhang , Jun Xu

Natural Language Processing and Generation systems have recently shown the potential to complement and streamline the costly and time-consuming job of professional fact-checkers. In this work, we lift several constraints of current…

Computation and Language · Computer Science 2025-10-30 Daniel Russo , Stefano Menini , Jacopo Staiano , Marco Guerini

Our society is facing rampant misinformation harming public health and trust. To address the societal challenge, we introduce FACT-GPT, a system leveraging Large Language Models (LLMs) to automate the claim matching stage of fact-checking.…

Computation and Language · Computer Science 2024-02-09 Eun Cheol Choi , Emilio Ferrara

The recent advances in large language models (LLM) and foundation models with emergent capabilities have been shown to improve the performance of many NLP tasks. LLMs and Knowledge Graphs (KG) can complement each other such that LLMs can be…

Computation and Language · Computer Science 2023-08-07 Nandana Mihindukulasooriya , Sanju Tiwari , Carlos F. Enguix , Kusum Lata

Large language models (LLMs) are increasingly used in applications requiring factual accuracy, yet their outputs often contain hallucinated responses. While fact-checking can mitigate these errors, existing methods typically retrieve…

Computation and Language · Computer Science 2026-01-07 Haoran Wang , Maryam Khalid , Qiong Wu , Jian Gao , Cheng Cao

Hallucinations in large language models (LLMs) during summarization of patient-clinician dialogues pose significant risks to patient care and clinical decision-making. However, the phenomenon remains understudied in the clinical domain,…

Large language models (LLMs) are notorious for hallucinating, i.e., producing erroneous claims in their output. Such hallucinations can be dangerous, as occasional factual inaccuracies in the generated text might be obscured by the rest of…

Fine-tuning for large language models (LLMs) typically requires substantial amounts of high-quality supervised data, which is both costly and labor-intensive to acquire. While synthetic data generation has emerged as a promising solution,…

Computation and Language · Computer Science 2025-05-28 Zihong Chen , Wanli Jiang , Jinzhe Li , Zhonghang Yuan , Huanjun Kong , Wanli Ouyang , Nanqing Dong

Despite their remarkable capabilities, Large Language Models (LLMs) are prone to generate responses that contradict verifiable facts, i.e., unfaithful hallucination content. Existing efforts generally focus on optimizing model parameters or…

Computation and Language · Computer Science 2025-01-28 Dingkang Yang , Dongling Xiao , Jinjie Wei , Mingcheng Li , Zhaoyu Chen , Ke Li , Lihua Zhang

Large language models (LLMs) are known to hallucinate, producing natural language outputs that are not grounded in the input, reference materials, or real-world knowledge. In enterprise applications where AI features support business…

Computation and Language · Computer Science 2025-08-05 Hagyeong Shin , Binoy Robin Dalal , Iwona Bialynicka-Birula , Navjot Matharu , Ryan Muir , Xingwei Yang , Samuel W. K. Wong

While Large Language Models have transformed how we interact with AI systems, they suffer from a critical flaw: they confidently generate false information that sounds entirely plausible. This hallucination problem has become a major…

Artificial Intelligence · Computer Science 2025-10-28 Piyushkumar Patel