#equality  the quality of being the same in quantity or measure or value or status
  exclusion:  inequality
  supertype:  sameness  the quality of being alike: "sameness of purpose kept them together"
  subtype:  equatability  capability of being equated
  subtype:  equivalence  essential equality and interchangeability
     subtype:  parity  functional equality
  subtype:  evenness  the quality of being balanced

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