That's Not My Job!
This is a story about four people named Everybody, Somebody, Anybody and Nobody.
There was an important job to be done and Everybody was sure that Somebody would do it. Anybody could have done it, but Nobody did it. Somebody got angry about that, because it was Everybody's job. Everybody thought Anybody could do it, but Nobody realized that Everybody wouldn't do it.
It ended up that Everybody blamed Somebody when Nobody did what Anybody could have done.
(Everybody, somebody, anybody and nobody are four important indefinite pronouns. We use them all the time. This anonymous story is often quoted in business advice books and websites.)