In the United States, and in some other countries under the concept of fair dealing, certain uses of copyrighted material may not necessitate permission from the copyright owner. Fair use is a legal doctrine that permits the use of copyrighted material in certain circumstances without authorization.
Determining whether a specific use qualifies as fair use is typically decided by a court of law. Courts evaluate fair use arguments based on four key factors:
Fair use determinations are context-specific, and there is no fixed formula to determine fairness. If uncertain about whether a particular use qualifies as fair use, seeking legal advice is recommended. Please note that Goodbye App cannot provide guidance on whether your use constitutes fair use or not.
Learn more at: http://en.wikipedia.org/wiki/Fair_use