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in‧con‧sis‧tent

1 two statements that are inconsistent cannot both be true [= contradictory; ≠ consistent]:
The accounts of the witnesses are inconsistent.
The accounts of the witnesses are inconsistent.2 not right according to a particular set of principles or standards [≠ consistent]
inconsistent with
His conduct was inconsistent with what is expected of a Congressman.
His conduct was inconsistent with what is expected of a Congressman.3 inconsistent behaviour, work etc changes too often from good to bad [≠ consistent]:
The team's performance has been highly inconsistent this season.
The team's performance has been highly inconsistent this season.