Fair use is the possibility to use copyrighted material for a limited purpose, such as to comment, criticise or parody. For example, if we get the paragraph of a book as a citation. Now, can we do it?
Fair use is an established doctrine in the United States, but it is not under any common legal framework in the European Union. Even though some members have special copyright exceptions that work similarly to that of fair use, it does not exist in Europe.
In other words, if the license of the work does not allow us to do it, then we need to ask for permission.
