A persuasive delusion is a psychotic symptom in which a person is honestly and improbably convinced that they are being watched, want to be killed, or are harmed (eg by a drone or a bomb in a landfill). This condition may be part of illnesses such as schizophrenia or paranoid personality disorder. It is important to understand that a person does not control these thoughts. They seem completely real to him, even if objectively they are not there.