Verified80% confidenceFactExact time
The fair use doctrine established under Section 107 of the U.S. Copyright Act was codified in 1976, and courts must weigh four factors: the purpose and character of the use, the nature of the copyrighted work, the amount used, and the market impact.
9
Sources
80%
Confidence
Long-term
Relevance
7/23/2026
First Seen
Sources
Related Claims
Verified合理使用是美国版权法第107条确立的例外原则，判断标准涵盖使用目的、作品性质、使用比例及对市场的影响四个维度85% similarVerifiedFair use is a principle in U.S. copyright law that permits limited use of copyrighted works without the copyright holder's permission for purposes such as commentary, news reporting, teaching, and research.71% similarVerifiedThe Fair Use doctrine established by Section 107 of the U.S. Copyright Act is the primary defense basis for AI companies, with the core argument being that model training constitutes transformative use.68% similarUnverified美国版权法第102条规定版权保护延伸至固定在有形表达媒介中的原创作品67% similarUnverifiedThe Copyright Remedy Clarification Act of 1990 and related case law clarify that federal and state governments can be sued and held liable for copyright infringement65% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/599929API
curl https://kongchang.com/api/v1/knowledge/claims/599929MCP
get_claim(id=599929)