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dementia vs. senility

[ dih-men-shuh, -shee-uh ]
  1. a condition characterized by progressive, persistent, severe impairment of intellectual capacity, including memory loss, confusion, and emotional instability, resulting from the loss of or damage to neurons in the brain.
[ si-nil-i-tee ]
  1. the state of being senile, especially the weakness or mental infirmity of old age.

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