Everybody, Somebody, Anybody & Nobody

There is a story about four people named Everybody, Somebody, Anybody & Nobody. There was an important job to be done and everybody was sure somebody would do it. Anybody could have done it, but nobody did it. Now, when somebody got angry about that because it was everybody's job, everybody thought that anybody could do it, but nobody realized that everybody would not do it. It ended up that everybody blamed somebody when nobody did what anybody could have done.