کاهش جرم

A: You’re yawning.

B: I sure am.

A: You should go to bed.

B: I will as soon as I finish this article.

A: What are you reading?

B: It’s about crime in Los Angeles.

A: What does it say?

B: The mayor says the crime rate is going down.

A: Then why does everyone lock their doors?

B: I guess they haven’t read this article.

A: No one believes that the crime rate is going down.

B: Maybe the mayor is just talking about his own neighborhood