The function does not hold for a considerable portion of the domain. Many inputs, such as literary works (e.g., "Jane Eyre"), musical works (e.g., "L'Orfeo"), people (e.g., "Scott Morrison"), and some landmarks/locations (e.g., "Statue of Liberty" or "Great Wall of China"), yield undefined results. The function rule applies mainly to certain geographic places and iconic landmarks, but its behavior is inconsistent.