Delusions are one of the main symptoms of schizophrenia, whereby the sufferer has false beliefs that are in conflict with reality. People who suffer from schizophrenia are likely delusional as they are unable to tell what is real from what is being imagined.
Preston’s conviction that, the woman from the cable company is plotting together with his neighbor to install surveillance equipment to track his moves, is clearly delusions. This is a major symptom of schizophrenia being demonstrated. Preston’s imagination is far from reality
