Answer:
In the United States, the four factors that a court will evaluate to determine whether a particular use of a copyrighted work is a fair use are:
- The purpose and character of the use, including whether the use is for a commercial or non-profit purpose, and whether the use is transformative (that is, whether it adds something new to the original work or uses it in a way that is significantly different from the original).
- The nature of the copyrighted work, including whether it is a creative work (such as a novel or a painting) or a factual work (such as a news article or a scientific paper).
- The amount and substantiality of the portion of the work used in relation to the whole work.
- The effect of the use on the potential market for or value of the copyrighted work.
These factors are often referred to as the "four fair use factors." In a fair use dispute, a court will consider all four factors and weigh them against each other to determine whether the use in question is a fair use.