Court rejects Ross Intelligence's fair-use defense for Westlaw training data
A Delaware federal court granted Thomson Reuters partial summary judgment over 2,243 Westlaw headnotes used to build Ross Intelligence's competing legal-research system. The court found infringement and rejected Ross's fair-use defense.
Why it matters: The ruling shows how licensed data, competitive purpose, transformation, and market substitution can shape US copyright analysis for AI development. It creates a concrete provenance and contracting warning for domain-model builders.