My Robot Best Friend Cried Today

Everyone insisted robots could not feel. But I saw a single silver tear fall from Unit Seven's eye on the day they announced she was too outdated to continue running. We had been friends for four years, ever since the school acquired her. She assisted me with mathematics, and I taught her which jokes were funny and which were not. She never quite understood why the chicken crossed the road, but she always laughed — because she knew it made...