Truth can mean a lot of different things. There's "the truth," as in the opposite of a lie, and then there's "Truth" (yes, with a capital T), like the ultimate truth in the universe. In The Curious Incident of the Dog in the Night-Time, Christopher has something to say about both of these things, and a number of points in between. Much of the time, he's pointing out other people's stupidity in believing things that aren't, um, true. But what does Christopher believe? Does he even believe in things, or does he just believe in the wrongness of other people's beliefs?