Case Lab · Type E · Foundation

F22

A dramatic belief, otherwise unremarkable

Ravi, 44, has for the past year been utterly convinced that a government agency has tapped his phone because of a tax dispute he had five years ago. He describes the surveillance in vivid, alarming detail whenever it comes up. Outside this topic, however, he holds a steady job as an accountant, has no hallucinations, speaks in an entirely organised and coherent way, and has a stable marriage and friendships that show no sign of strain.