Fair use is a legal doctrine that allows the unlicensed use of copyrighted material in certain circumstances. The fair use analysis considers the purpose and character of the use, the nature of the copyrighted work, the amount and substantiality of the portion used, and the effect of the use on the market for the copyrighted work.

Copyright doesn’t protect facts, federal government publications, works not fixed in a tangible form, ideas or concepts, words and phrases, or familiar symbols.

The four rules of copyright are used to prove infringement. This involves establishing ownership of the work, in addition to proving the infringer had access and the means to copy the work, and that there are substantial similarities between the original and the copy.