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Delusional disorders, also known as persistent delusional disorder or paraphrenia, are a type of serious mental illness characterized by the presence of one or more delusions that persist for at least one month. A delusion is a firmly held belief that is not based in reality and is resistant to rational argument or confrontation with evidence to the contrary.

Ancestors (6)

  1. Belief
  2. Truth
  3. Mathematical logic
  4. Fields of mathematics
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