The idea of constructing a world from scratch is important to the thematic concerns of the novel, though its relevance is not apparent until the story’s closing chapters. Meanwhile, the fact that Rachel left without shoes is yet another sign that she did not disappear on her own. After all, if she managed to escape the facility by herself, she would find herself in rough terrain. Additionally, Teddy’s momentary understanding of Rachel’s note suggests a connection between the two of them; however, like everything else in the novel, that connection is hazy for the time being.