To qualify for copyright protection, a work must be "fixed in a tangible medium of expression." This means that the work must exist in some physical form for at least some period of time, no matter how brief. Virtually any form of expression will qualify as a tangible medium, including a computer's random access memory (RAM), the recording media that capture all radio and television broadcasts, and the scribbled notes on the back of an envelope that contain the basis for an impromptu speech.

In addition, the work must be original -- that is, independently created by the author. It doesn't matter if an author's creation is similar to existing works, or even if it is arguably lacking in quality, ingenuity or aesthetic merit. So long as the author toils without copying from someone else, the results are protected by copyright.

Finally, to receive copyright protection, a work must be the result of at least some creative effort on the part of its author. There is no hard and fast rule as to how much creativity is enough. As one example, a work must be more creative than a telephone book's white pages, which involve a straightforward alphabetical listing of telephone numbers rather than a creative selection of listings."

Stamford University Libraries, 2005

"Fair use is a copyright principle based on the belief that the public is entitled to freely use portions of copyrighted materials forpurposes of commentary and criticism. For example, if you wish to criticize a novelist, you should have the freedom to quote a portion of the novelist's work without asking permission. Absent this freedom, copyright owners could stifle any negative comments about their work.

Unfortunately, if the copyright owner disagrees with your fair use interpretation, the dispute will have to be resolved by courts or arbitration. If it's not a fair use, then you are infringing upon the rights of the copyright owner and may be liable for damages.

The only guidance is provided by a set of fair use factors outlined in the copyright law. These factors are weighed in each case to determine whether a use qualifies as a fair use. For example, one important factor is whether your use will deprive the copyright owner of income. Unfortunately, weighing the fair use factors is often quite subjective. For this reason, the fair use road map is often tricky to navigate."

Stamford University Libraries, 2005