Fool·er·y n.; pl. Fooleries
  1. The practice of folly; the behavior of a fool; foolish behavior; absurdity.
  Folly in fools bears not so strong a note,
  As foolery in the wise, when wit doth dote.   --Shak.
  2. An act of folly or weakness; a foolish practice; something absurd or nonsensical.
     That Pythagoras, Plato, or Orpheus, believed in any of these fooleries, it can not be suspected.   --Sir W. Raleigh.
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