He think the best use for his twin would be at his mother's home . She lives far away, and he is rarely able to visit her . But if she had a robot, she could spend more time with "him" . When asked why his mother would be happy with a robot son, he replies, "Because it is myself" . If robots become enough like people that you can't tell the difference, Ishiguro wonders, "does it really matter if you're interacting with a human or machine?