FactSim: Fact-Checking for Opinion Summarization

• URL: http://arxiv.org/abs/2602.08709v1
• Date: Mon, 09 Feb 2026 14:21:19 GMT
• Title: FactSim: Fact-Checking for Opinion Summarization
• Authors: Leandro Anghinoni, Jorge Sanchez,
• Abstract summary: We explore the need for more comprehensive and precise evaluation techniques for generative artificial intelligence (GenAI) in text summarization tasks.<n>Traditional methods, which leverage automated metrics to compare machine-generated summaries from a collection of opinion pieces, have shown limitations due to the paradigm shift introduced by large language models (LLM)<n>This paper proposes a novel, fully automated methodology for assessing the factual consistency of such summaries.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: We explore the need for more comprehensive and precise evaluation techniques for generative artificial intelligence (GenAI) in text summarization tasks, specifically in the area of opinion summarization. Traditional methods, which leverage automated metrics to compare machine-generated summaries from a collection of opinion pieces, e.g. product reviews, have shown limitations due to the paradigm shift introduced by large language models (LLM). This paper addresses these shortcomings by proposing a novel, fully automated methodology for assessing the factual consistency of such summaries. The method is based on measuring the similarity between the claims in a given summary with those from the original reviews, measuring the coverage and consistency of the generated summary. To do so, we rely on a simple approach to extract factual assessment from texts that we then compare and summarize in a suitable score. We demonstrate that the proposed metric attributes higher scores to similar claims, regardless of whether the claim is negated, paraphrased, or expanded, and that the score has a high correlation to human judgment when compared to state-of-the-art metrics.

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