Learning the language of doubt opens Rooke up to truly doubt the purpose, morality, and righteousness of everything else—including his involvement in the British military. In this way, the novel also suggests that truth isn't something static. Rooke initially thought he was recording truth, when in reality he recorded his own lack of understanding. By questioning that, he realizes that his early
misunderstanding is the real truth, while his initial thoughts about his notebooks are nothing more than a story like Silk’s.