Fair use is a doctrine in United States copyright law that allows for the limited use of copyrighted material without the permission of the copyright owner in certain circumstances. The purpose of fair use is to balance the interests of copyright owners with the public interest in the free flow of information and the advancement of knowledge.

The fair use doctrine applies to the use of copyrighted material for purposes such as criticism, commentary, news reporting, teaching, scholarship, or research. The determination of whether a particular use of copyrighted material is a fair use depends on a number of factors, including:

    The purpose and character of the use, including whether the use is commercial or non-commercial, and whether it is transformative (that is, whether it adds something new and different to the original work).

    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 used in relation to the copyrighted work as a whole.

    The effect of the use on the potential market for or value of the copyrighted work.

In general, the more transformative the use, the more likely it is to be considered fair use. The more the use is commercial in nature, and the more it takes away from the potential market for the original work, the less likely it is to be considered fair use.

It is important to note that fair use is a doctrine in United States law and is not applicable in other countries. Additionally, the determination of whether a use is fair use is highly fact-specific and can be difficult to predict. If you are unsure about whether your use of copyrighted material is a fair use, it is best to seek the advice of a qualified attorney.
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