A phenomenon in generative AI where the model produces content that sounds plausible but is factually incorrect or fabricated. Because AI models generate fluent text regardless of factual accuracy, hallucinated outputs can be difficult to distinguish from correct information. Users must verify AI-generated content against reliable sources rather than accepting it uncritically.

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• 2025r07 #10生成 AI において，もっともらしいが事実とは異なる内容が出力されることを表す用語として，最も適切なものはどれか。