Some people think that in every barrel of politicians there are only a few rotten ones. But if deceit is a quality of rottenness, I believe all effective politicians are rotten. They must be deceitful in order to do the job properly. Someone who is scrupulously honest about obeying the rules of society will never be an effective politician. Assuming that the author's statements are accurate, which one of the following statements CANNOT be true? ['Some scrupulously honest politicians are effective.', "Some people define a politician's job as obeying the rules of society.", 'Some politicians are scrupulously honest.', 'Some people think all politicians are rotten.']