Deterioration or loss of intellectual capacity which requires continual supervision to protect the insured or others, as measured by clinical evidence and standardized tests that reliably measure impairment in the area of (1) short or long term memory, (2) orientation as to person, place and time, or (3) deductive or abstract reasoning. Such loss in intellectual capacity can result from Alzheimer's disease or similar forms of senility or Irreversible Dementia.