The Curious Incident of the Dog in the Night-Time Chapter 3 Summary

How It All Goes Down

Finally, the narrator introduces himself: "My name is Christopher John Francis Boone. I know all the countries of the world and their capital cities and every prime number up to 7057" (3.1).
Then he shows us some pictures of faces (happy faces, sad faces, angry faces) that a woman called Siobhan showed him some years before.
He explains that he has a difficult time differentiating between them.