Debates over definition of "jazz"
As the term "jazz" has long been used for a wide variety of styles, a comprehensive definition including all varieties is elusive. While some enthusiasts of certain types of jazz have argued for narrower definitions which exclude many other types of music also commonly known as jazz, jazz musicians themselves are often reluctant to define the music they play. Duke Ellington summed it up by saying, "It's all music." Some critics have even stated that Duke Ellington's music was not in fact jazz, as by its very definition, according to them, jazz cannot be orchestrated.