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Large language models (LLMs) hallucinate with confidence: their outputs can be fluent, authoritative, and simply wrong. In medical, legal, and scientific applications this failure causes direct harm, and detecting it from internal model…

Computation and Language · Computer Science 2026-05-19 Khizar Hussain , Murat Kantarcioglu

Retrieval-augmented generation (RAG) appears as a promising method to alleviate the "hallucination" problem in large language models (LLMs), since it can incorporate external traceable resources for response generation. The essence of RAG…

Computation and Language · Computer Science 2024-10-16 Haosheng Qian , Yixing Fan , Ruqing Zhang , Jiafeng Guo

Ambiguity in natural language poses significant challenges to Large Language Models (LLMs) used for open-domain question answering. LLMs often struggle with the inherent uncertainties of human communication, leading to misinterpretations,…

Computation and Language · Computer Science 2024-11-20 Aryan Keluskar , Amrita Bhattacharjee , Huan Liu

Large language models (LLMs) demonstrate strong capabilities in natural language processing but remain prone to hallucinations, generating factually incorrect or fabricated content. This issue undermines their reliability, particularly in…

Computation and Language · Computer Science 2025-02-19 Cheng Peng Huang , Hao-Yuan Chen

Large language models (LLMs) have significantly advanced natural language processing tasks, yet they are susceptible to generating inaccurate or unreliable responses, a phenomenon known as hallucination. In critical domains such as health…

Computation and Language · Computer Science 2024-09-20 Sumera Anjum , Hanzhi Zhang , Wenjun Zhou , Eun Jin Paek , Xiaopeng Zhao , Yunhe Feng

Although large language models (LLMs) have been touted for their ability to generate natural-sounding text, there are growing concerns around possible negative effects of LLMs such as data memorization, bias, and inappropriate language.…

Machine Learning · Computer Science 2023-05-10 Michael Kuchnik , Virginia Smith , George Amvrosiadis

Large Language Models (LLMs) enhanced with retrieval -- commonly referred to as Retrieval-Augmented Generation (RAG) -- have demonstrated strong performance in knowledge-intensive tasks. However, RAG pipelines often fail when retrieved…

Computation and Language · Computer Science 2025-11-07 Shiyin Lin

While large language models (LLMs) excel in mathematical and code reasoning, we observe they struggle with social reasoning tasks, exhibiting cognitive confusion, logical inconsistencies, and conflation between objective world states and…

Computation and Language · Computer Science 2025-10-14 Jialu Du , Guiyang Hou , Yihui Fu , Chen Wu , Wenqi Zhang , Yongliang Shen , Weiming Lu

Precisely understanding users' contextual search intent has been an important challenge for conversational search. As conversational search sessions are much more diverse and long-tailed, existing methods trained on limited data still show…

Information Retrieval · Computer Science 2023-10-23 Kelong Mao , Zhicheng Dou , Fengran Mo , Jiewen Hou , Haonan Chen , Hongjin Qian

The practice of Retrieval-Augmented Generation (RAG), which integrates Large Language Models (LLMs) with retrieval systems, has become increasingly prevalent. However, the repercussions of LLM-derived content infiltrating the web and…

Information Retrieval · Computer Science 2024-06-25 Xiaoyang Chen , Ben He , Hongyu Lin , Xianpei Han , Tianshu Wang , Boxi Cao , Le Sun , Yingfei Sun

Research in AI using Large-Language Models (LLMs) is rapidly evolving, and the comparison of their performance with human reasoning has become a key concern. Prior studies have indicated that LLMs and humans share similar biases, such as…

Computation and Language · Computer Science 2026-03-09 Hirohiko Abe , Risako Ando , Takanobu Morishita Kentaro Ozeki , Koji Mineshima , Mitsuhiro Okada

Like students facing hard exam questions, large language models sometimes guess when uncertain, producing plausible yet incorrect statements instead of admitting uncertainty. Such "hallucinations" persist even in state-of-the-art systems…

Computation and Language · Computer Science 2025-09-08 Adam Tauman Kalai , Ofir Nachum , Santosh S. Vempala , Edwin Zhang

Large language models (LLMs) suffer from the hallucination problem and face significant challenges when applied to knowledge-intensive tasks. A promising approach is to leverage evidence documents as extra supporting knowledge, which can be…

Computation and Language · Computer Science 2024-04-25 Xinxin Zheng , Feihu Che , Jinyang Wu , Shuai Zhang , Shuai Nie , Kang Liu , Jianhua Tao

Large Language Models (LLMs) sometimes suffer from producing hallucinations, especially LLMs may generate untruthful responses despite knowing the correct knowledge. Activating the truthfulness within LLM is the key to fully unlocking LLM's…

Computation and Language · Computer Science 2024-06-06 Shaolei Zhang , Tian Yu , Yang Feng

Despite the potential of Large Language Models (LLMs) in medicine, they may generate responses lacking supporting evidence or based on hallucinated evidence. While Retrieval Augment Generation (RAG) is popular to address this issue, few…

Large Language Models (LLMs) are versatile, yet they often falter in tasks requiring deep and reliable reasoning due to issues like hallucinations, limiting their applicability in critical scenarios. This paper introduces a rigorously…

Computation and Language · Computer Science 2023-11-21 Saizhuo Wang , Zhihan Liu , Zhaoran Wang , Jian Guo

The emergence of large language models (LLMs) has significantly advanced the development of natural language processing (NLP), especially in text generation tasks like question answering. However, model hallucinations remain a major…

Computation and Language · Computer Science 2025-12-01 Zhongxin Liu , Zhiwei Wang , Jun Niu , Ying Li , Hongyu Sun , Meng Xu , He Wang , Gaofei Wu , Yuqing Zhang

Large language models (LLMs) have demonstrated remarkable performance on various natural language processing tasks. However, they are prone to generating fluent yet untruthful responses, known as "hallucinations". Hallucinations can lead to…

Computation and Language · Computer Science 2024-06-18 Minda Hu , Bowei He , Yufei Wang , Liangyou Li , Chen Ma , Irwin King

With the recent development of natural language generation models - termed as large language models (LLMs) - a potential use case has opened up to improve the way that humans interact with robot assistants. These LLMs should be able to…

Multiagent Systems · Computer Science 2024-11-27 Mitchell Rosser , Marc. G Carmichael

Large language models (LLMs) have achieved a degree of success in generating coherent and contextually relevant text, yet they remain prone to a significant challenge known as hallucination: producing information that is not substantiated…

Computation and Language · Computer Science 2024-10-28 Ray Li , Tanishka Bagade , Kevin Martinez , Flora Yasmin , Grant Ayala , Michael Lam , Kevin Zhu