John Nash having delusions and hallucinations was what triggered the schizophrenia condition he had.
What is Schizophrenia?
This is a type of mental disorder in which individuals have an abnormal interpretation about reality.
John Nash worked as a spy and felt Russians were after him which was why he experienced paranoid schizophrenia which he later overcame through the support of his wife and friends.
Read more about John Nash here https://brainly.com/question/7660453
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