Friday, 21 July 2017
In Central Park
Laurie tells Carl that she lies awake, afraid of what he might blunder into. He reflects that, if he changes events back in Roman times, then he will return to a twentieth century in which neither his civilization nor Laurie had ever existed. But Laurie is walking, talking and sometimes lying awake afraid in a timeline where events had not been changed back in Roman times. Therefore, if Carl does change ancient events, he will generate a divergent timeline. Travelling to the twentieth century of that timeline, he will not find Laurie and it will indeed be true that she had never existed in that timeline but it will not be true that she had never existed period. She does exist, and is conversing with Carl, in the Central Park of the original timeline.