"That's not my job"

This is a story about 4 people, Everybody, Somebody, Anybody and Nobody.

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

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