Fair use of a copyrighted work for purposes such as criticism, comment, news reporting, teaching, scholarship, or research, is NOT an infringement of copyright. Fair use is determined on a case by case basis considering these four points:
- The purpose and character of the use, including whether such use is of a commercial nature or is for nonprofit educational purposes
- The nature of the copyrighted work
- The amount and substantiality of the portion used in relation to the copyrighted work as a whole.
- The effect of the use upon the potential market for or value of the copyrighted work