dis·in·ter·est·ed·ness /-tədnəs/
  Dis·in·ter·est·ed·ness, n. The state or quality of being disinterested; impartiality.
     That perfect disinterestedness and self-devotion of which man seems to be incapable, but which is sometimes found in woman.   --Macaulay.
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  disinterestedness
       n : freedom from bias or selfish motives