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Case Lab · Type A · Foundation

F22

One belief, two years, otherwise unremarkable

Elif, 47, has for the past two years been convinced that a coworker has been secretly recording her phone calls and forwarding them to her employer to have her fired. She describes this in detailed, internally consistent terms whenever it comes up, has changed her commute route and phone habits 'to be safe,' and has filed a formal complaint with management, but otherwise continues to work full-time, maintains her friendships, and shows no unusual speech, affect, or behaviour outside this topic. She has never had hallucinations, and no one else in her life shares the belief.

What is the best-supported classification?