Final answer:
In representing a client, a lawyer must not use means that have no substantial purpose other than to impede or prejudice the administration of justice.
Step-by-step explanation:
In representing a client, a lawyer must not use means that have no substantial purpose other than to impede or prejudice the administration of justice. This concept is central to the ethical duty of lawyers to act in the best interests of their clients while also upholding the principles of justice and fairness.
Lawyers are bound by professional rules of conduct and ethics, which require them to use reasonable and lawful means to represent their clients. They must not engage in deceptive or dishonest tactics, such as fabricating evidence or misleading the court, as these actions undermine the integrity of the legal system and hinder the pursuit of justice.
For example, if a lawyer were to knowingly present false testimony or suppress evidence that is favorable to the opposing party, they would be acting in violation of their professional obligations and engaging in conduct that has no substantial purpose other than to obstruct the proper administration of justice.