INCONSISTENT

[in.con.sis.tent] adj (1646): lacking consistency: as a: not compatible with another fact or claim "~ statements" b: containing incompatible elements "an ~ argument" c: incoherent or illogical in thought or actions: changeable d: not satisfiable by the same set of values for the unknowns "~ equations" "~ inequalities" -- in.con.sis.tent.ly adv