He also has hallucinations about being followed by a federal agent, in keeping with his academic world where the government seeks on the one hand to employ mathematicians and scientists and on the other hand mistrusts them. Many of the encounters he has in his mind with this agent and others have the aura of a detective movie, showing that Nash is replaying films he has seen and that these serve as the inspiration for his visions. In a way, that serves as another pattern in his mind, linking what he saw in the theater with what he believes is happening to him. Nothing comes out of whole cloth but always comes from experience and is then reformed in a form it did not have in reality.

In this way, the film shows the viewer the kind of world experienced by the schizophrenic and why this world is disorienting and...
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