There are four people named Everybody, Somebody, Anybody, and Nobody.

There was an important job to be done and Everybody was asked to do it.
Everybody was sure Somebody would do it.
Anybody could have done it, but Nobody did it.
Somebody got angry about this, because it was Everybodys job.
Everybody thought Anybody could do it, but Nobody realised that Everybody wouldn't do it.

It ended up that Everybody blamed Somebody when Nobody did what Anybody could have done.