Court Rules AI Training Data Not Fair Use

US appeals court finds AI training on copyrighted material violates copyright law.

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Oct 6, 2026

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Court Rules AI Training Data Not Fair Use

US appeals court finds AI training on copyrighted material violates copyright law.

In brief

US appeals court finds AI training on copyrighted material violates copyright law. A US appeals court ruled that Ross Intelligence’s use of Thomson Reuters’ legal data for AI training violated copyright law, marking a key legal challenge for AI companies. Originally reported by Futurism.

Fair Use Definition

A judge using his gavel in court.

The US Copyright Act allows copyrighted materials for criticism, journalism, and research.

AI Industry's Legal Defense

AI companies use fair use to defend against lawsuits over training data from copyrighted materials.

Ross Intelligence Case

Ross Intelligence trained its legal search engine on Thomson Reuters’ Westlaw data, violating copyright law.

Ross Shutdown

Ross Shutdown

Ross shut down in 2021 after financial strain from the lawsuit.

Court Ruling Details

The court found Ross copied Thomson Reuters’ headnotes verbatim, not transformative use.

AI Industry Reaction

Tech industry group says the ruling confirms highly transformative AI training is likely fair use.

“implicitly confirms that highly transformative gen AI training to produce a hugely multi-purpose model with substantial public benefit is likely fair use!”

What it means

A US appeals court ruled that Ross Intelligence’s use of Thomson Reuters’ legal data for AI training violated copyright law, marking a key legal challenge for AI companies.

Read the original on Futurism

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