Style Learning of Generative AI and Reexamination of the Scope of Expression Protection under U.S. Copyright Law: Focusing on the Idea-Expression Dichotomy and Substantial Similarity in Non-Literal Copying

Dayoung Jeong

doi:10.33982/clr.2026.5.31.4.147

May 31, 2026Chungnam Law Review

Style Learning of Generative AI and Reexamination of the Scope of Expression Protection under U.S. Copyright Law: Focusing on the Idea-Expression Dichotomy and Substantial Similarity in Non-Literal Copying

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Key Points

The study aims to explore how generative AI's ability to replicate styles challenges existing frameworks in U.S. copyright law.
Review of relevant U.S. copyright case law and theories focusing on style learning in generative AI.
Analysis of the implications of style replication in the context of the idea-expression dichotomy and substantial similarity standards.
Evaluation of statistical correlations and expressions in AI-generated outputs compared to original works.
Identified that style is generally not protected but can be assessed for substantial similarity if it reproduces specific expressive elements.
Highlighted the need for distinct legal frameworks to address direct copying versus stylistic similarities in AI outputs.
Proposed that generative AI outputs may infringe copyright if they significantly replicate the expressive choices of the original work.

Implication

This examination addresses expression protection issues in copyright law due to generative AI's style replication, suggesting analytic frameworks for legal implications.

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Cite This Study

Dayoung Jeong (2026) studied this question.

synapsesocial.com/papers/6a323e9ed50b63ecad207d89 https://doi.org/10.33982/clr.2026.5.31.4.147

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Style Learning of Generative AI and Reexamination of the Scope of Expression Protection under U.S. Copyright Law: Focusing on the Idea-Expression Dichotomy and Substantial Similarity in Non-Literal Copying

Key Points

Implication

Discussion

Cite This Study

Style Learning of Generative AI and Reexamination of the Scope of Expression Protection under U.S. Copyright Law: Focusing on the Idea-Expression Dichotomy and Substantial Similarity in Non-Literal Copying

Key Points

Implication

Discussion

Cite This Study

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