Unverified50% confidenceFactExact time
Human writing typically fluctuates greatly between simple and complex sentences, whereas the perplexity fluctuation of AI output is relatively smooth.
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50%
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9/11/2026
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VerifiedPerplexity measures how surprising a piece of text is to the model; AI tends to select high-probability words, so its perplexity is relatively low.77% similarUnverifiedParticipants who frequently used generative AI to complete writing tasks showed measurable declines in argument organization ability and depth of reasoning in subsequent independent writing tests.71% similarUnverifiedAI在缺乏明确约束时倾向于用统计上最合理的内容填充空白，而非主动询问澄清，这是幻觉问题的延伸69% similarUnverifiedAI文本水印面临不可感知性与鲁棒性之间的天然矛盾，两者相互制约68% similar
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