Charlie compares the elevator to a "Chinese Box" - a thought experiment asking whether there is a difference between a computer algorithmically responding to sentences typed it in Chinese and a person who doesn't speak Chinese following the same algorithms as the computer. He explains how it is an example of the Turing test.
Caleb defines the Turing Test at Nathan's request and explains the implications of a positive response to the test. To Caleb's excitement, Nathan mentions that he's built an AI and that Caleb will be the human component of the test.
Detective Spooner tries to interrogate Sonny, a robot, to find out why he murdered his creator, Alfred Lanning. Spooner challenges Sonny's claims that robots can feel emotions and dreams; however, Sonny appears to convince him otherwise as the conversation progresses. Sonny then reveals that Lanning had asked him for a favor. As Lanning is someone he loves, Sonny felt obliged to do what was asked of him.