The Three Body Problem begins with an inexplicable series of tragic mysteries, most notably, that physics as we know it has stopped working. Slowly, the reader is given enough clues to start to suspect various causes, although halfway through, we still don’t really know what’s going on. Dukes has read it before, and Bagg has not, so they lads compare notes as to their experience of the creeping awareness of the disturbing truth dawning on the characters.