The Collaborative International Dictionary of English v.0.48:

Inconsistency \In`con*sist"en*cy\, n.; pl. Inconsistencies.
   [Cf. F. inconsistance.]
   [1913 Webster]
   1. The quality or state of being inconsistent; discordance in
      respect to sentiment or action; such contrariety between
      two things that both can not exist or be true together;
      disagreement; incompatibility.
      [1913 Webster]

            There is a perfect inconsistency between that which
            is of debt and that which is of free gift. --South.
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   2. Absurdity in argument ore narration; incoherence or
      irreconcilability in the parts of a statement, argument,
      or narration; that which is inconsistent.
      [1913 Webster]

            If a man would register all his opinions upon love,
            politics, religion, and learning, what a bundle of
            inconsistencies and contradictions would appear at
            last!                                 --Swift.
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   3. Lack of stability or uniformity; unsteadiness;
      changeableness; variableness.
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            Mutability of temper, and inconsistency with
            ourselves, is the greatest weakness of human nature.
                                                  --Addison.
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