inconsistent








adjective

  1. lacking in harmony between the different parts or elements; self-contradictory: an inconsistent story.
  2. lacking agreement, as one thing with another or two or more things in relation to each other; at variance: a summary that is inconsistent with the previously stated facts.
  3. not consistent in principles, conduct, etc.: He’s so inconsistent we never know if he’ll be kind or cruel.
  4. acting at variance with professed principles.
  5. Logic. incompatible(def 4b).

adjective

  1. lacking in consistency, agreement, or compatibility; at variance
  2. containing contradictory elements
  3. irregular or fickle in behaviour or mood
  4. Also: incompatible maths (of two or more equations) not having one common set of values of the variables: x + 2 y = 5 and x + 2 y = 6 are inconsistent
  5. logic (of a set of propositions) enabling an explicit contradiction to be validly derived
adj.

1640s, “not agreeing in substance or form,” from in- (1) “not, opposite of” + consistent. Related: Inconsistently.

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