The part of this piece that is important is the exploration of “substantiality”, what exactly it means and how it is used in the courts in regards to copyright infringement.  The author explains that there are multiple connotations that “substantiality” takes on in court.  The first connotation of substantiality as a “criterion of infringement involves the ‘ordinary observer’ test.”  Under this test it must “spontaneously and immediately” appear to the average person that the newly created work used or was based on the original.  This test is rough for obvious reasons.  Also, it would be almost impossible to ask the “average person” to tell right away the difference between material that is appropriated and that which is simply similar to the original.  The second connotation involves economics and has no relation to my thesis. The third connotation is almost the opposite of the first and is based on “literary analysis or classification,” or in other words an ‘expert opinion.’  This connotation is helpful in making ‘substantiality’ qualitative rather than quantitative, but not so helpful in that it often leads the court into “abstract literary speculations unrelated to the ends of the copyright law.”  The final connotation is that of ‘substantiality’ as a quantitative test, though this connotation is rejected.  The paper then goes on to show how these connotations of substantiality relate directly to parodies through examples.