#performance.achievement  any recognized accomplishment; "they admired his performance under stress"; "when Roger Maris powered four home runs in one game his performance merits awe"
  supertype:  #achievement  the action of accomplishing something
  subtype:  #overachievement  better than expected performance (better than might have been predicted from intelligence tests)
  subtype:  #underachievement  poorer than expected performance (poorer than might have been predicted from intelligence tests)

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