Nash exhibited negative symptoms such as flat affect, alogia, and anhedonia. This had negative consequences on his interpersonal relationships, since, apart from his extraordinary wife (a brilliant and determined student of John) and his classmates, he had none and they were put to the test by his misunderstood behavior. Throughout the film, although he is articulate, his speech is soft and staccato, his movements are awkward, and he has eye movement dysfunction. Because of this and the respective symptoms mentioned above, his level of functioning is severely impaired for a significant period of time from onset, meeting criteria B for