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Noun: capriciousness  ku'pri-shus-nus
  1. The quality of being guided by sudden unpredictable impulses
    - unpredictability
  2. The trait of acting unpredictably and more from whim or caprice than from reason or judgment
    "I despair at the capriciousness and whimsicality of my memory";
    - flightiness, arbitrariness, whimsicality, whimsy, whimsey

Type of: changefulness, inconstancy, irresponsibility, irresponsibleness