#miscalculation__misreckoning__misestimation  a mistake in calculating
  supertype:  #mistake__error__fault  a wrong action attributable to bad judgment or ignorance or inattention; "he made a bad mistake"; "she was quick to point out my errors"; "I could understand his English in spite of his grammatical faults"
  subtype:  #boomerang__backfire  a miscalculation that recoils on its maker

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