fair use
The fair use doctrine is a body of law and court decisions, which provide for limitations and exceptions to copyright protection in the United States. In a case where the fair use defense is asserted, the defendant has conceded that an infringement of the copyright laws has taken place but that the action falls within an excepted category of activities. The factors to be examined to determine if the fair use defense is appropriate include: 1. The purpose and character of the use, including whether such use is of a commercial nature or is for nonprofit educational purposes; 2. ... The effect of the use upon the potential market for or value of the copyrighted work.