In other cases , the delusion may be assumed to be false by a doctor or psychiatrist assessing the belief , because it `` seems '' to be unlikely , bizarre or held with excessive conviction . Psychiatrists rarely have the time or resources to check the validity of a person 's claims leading to some true beliefs to be erroneously classified as delusional .
A doctor or psychiatrist may say that a delusion is false , because it `` seems '' to be unlikely or bizarre.Psychiatrists rarely have the time or resources to check the validity of a person 's claims ; this means that some true beliefs are erroneously classified as delusional .