Answer:
delusion of grandeur
Step-by-step explanation:
Schizophrenia is commonly associated with older people and it involves lack of clear reasoning and general comportment of the individual. Delusion of grandeur is a common symptom of people with this ailment. Delusion of grandeur involves individuals behaving or believing to have some form of supernatural powers to do certain things.
A person with schizophrenia believing that his neighbor's cat sends him information which is extraordinary means delusion of grandeur is the right choice.