Trademark law is likely to be one of the most subjective areas of the law. The reason for this is that language and communication, which are at the heart of trademarks, depend completely on one's cultural experiences, whether those experiences are shaped by ethnicity, economic class or even the passage of time. For instance, cases decided one way today might have been decided differently 50 years ago, simply because the connotation of words and symbols change through time.

Because of the inherent subjectivity in trademark law, it is not unusual for a Examining Attorney with the U.S. Patent and Trademark Office, or a federal court judge to have differing views on the legal attributes of a mark. Likewise, a legal opinion given by an attorney regarding theavailability of a mark may not agree with the opinion arrived at by another attorney or judge looking at the same material.  Yet, all may have legitimate opinions. For this reason, it may be a good idea to obtain second and third opinions from different attorneys when clearing a mark for use.