Words, words, words.Our surroundings are so thoroughly saturated with images and logos, both still and moving, that forbidding artists to use them in their work is like barring 19th-century landscape painters from depicting trees on their canvases. Pop culture is our landscape. It is at times wonderful. Most of us would not want to live without it. But it is also insidious and aggressive. The stuff is all around us, and society benefits from multiple means of staving it off. We are entitled to have artists, as well as political cartoonists, composers and writers, portray, parody and dissect it.