(a) A lawyer shall not knowingly:
(1) Make a false statement of material fact or law to a tribunal;
(2) Counsel or assist a client to engage in conduct that the lawyer knows is criminal or fraudulent, but a lawyer may discuss the legal consequences of any proposed course of conduct with a client and may counsel or assist a client to make a good-faith effort to determine the validity, scope, meaning, or application of the law;
(3) Fail to disclose to the tribunal legal authority in the controlling jurisdiction not disclosed by opposing counsel and known to the lawyer to be dispositive of a question at issue and directly adverse to the position of the client; or
(4) Offer evidence that the lawyer knows to be false, except as provided in paragraph (b).
(b) When the witness who intends to give evidence that the lawyer knows to be false is the lawyer’s client and is the accused in a criminal case, the lawyer shall first make a good-faith effort to dissuade the client from presenting the false evidence; if the lawyer is unable to dissuade the client, the lawyer shall seek leave of the tribunal to withdraw. If the lawyer is unable to dissuade the client or to withdraw without seriously harming the client, the lawyer may put the client on the stand to testify in a narrative fashion, but the lawyer shall not examine the client in such manner as to elicit testimony which the lawyer knows to be false, and shall not argue the probative value of the client’s testimony in closing argument.
(c) The duties stated in paragraph (a) continue to the conclusion of the proceeding.
(d) A lawyer who receives information clearly establishing that a fraud has been perpetrated upon the tribunal shall promptly reveal the fraud to the tribunal unless compliance with the duty would require disclosure of information otherwise protected by Rule 1.6, in which case the lawyer shall promptly call upon the client to rectify the fraud.
 This Rule defines the duty of candor to the tribunal. In dealing with a tribunal the lawyer is also required to comply with the general requirements of Rule 1.2(e) and (f). However, an advocate does not vouch for the evidence submitted in a cause; the tribunal is responsible for assessing its probative value.
Representations by a Lawyer
 An assertion purported to be made by the lawyer, as in an affidavit by the lawyer or in a statement in open court, may properly be made only when the lawyer knows the assertion is true or believes it to be true on the basis of a reasonably diligent inquiry. There may be circumstances where failure to make a disclosure is the equivalent of an affirmative misrepresentation. The obligation prescribed in Rule 1.2(e) not to counsel a client to commit or assist the client in committing a fraud applies in litigation but is subject to Rule 3.3(b) and (d). Regarding compliance with Rule 1.2(e), see the Comment to that Rule. See also Comment to Rule 8.4(b).
Misleading Legal Argument
 Legal argument based on a knowingly false representation of law constitutes dishonesty toward the tribunal. A lawyer is not required to make a disinterested exposition of the law, but must recognize the existence of pertinent legal authorities. Furthermore, as stated in subparagraph (a)(3), an advocate has a duty to disclose directly adverse authority in the controlling jurisdiction that has not been disclosed by the opposing party and that is dispositive of a question at issue. The underlying concept is that legal argument is a discussion seeking to determine the legal premises properly applicable to the case.
 When evidence that a lawyer knows to be false is provided by a person who is not the client, the lawyer must refuse to offer it regardless of the client’s wishes.
 When false evidence is offered by the client, however, a conflict may arise between the lawyer’s duty to keep the client’s revelations confidential and the duty of candor to the court. Upon ascertaining that material evidence is false, the lawyer should seek to persuade the client that the evidence should not be offered or, if it has been offered, that its false character should immediately be disclosed.
 Paragraph (d) provides that if a lawyer learns that a fraud has been perpetrated on the tribunal, the lawyer must reveal the fraud to the tribunal. However, if the notification of the tribunal would require disclosure of information protected by Rule 1.6, the lawyer may not inform the tribunal of the fraud; the lawyer’s only duty in such an instance is to call upon the client to rectify the fraud. In other cases, the lawyer may learn of the client’s intention to present false evidence before the client has had a chance to do so. In this situation, paragraphs (a)(4) and (b) forbid the lawyer to present the false evidence, except in rare instances where the witness is the accused in a criminal case, the lawyer is unsuccessful in dissuading the client from going forward, and the lawyer is unable to withdraw without causing serious harm to the client. The terms "criminal case" and "criminal defendant" as used in Rule 3.3 and its Comment include juvenile delinquency proceedings and the person who is the subject of such proceedings.
Perjury by a Criminal Defendant
 Paragraph (b) allows the lawyer to permit a client who is the accused in a criminal case to present false testimony in very narrowly circumscribed circumstances and in a very limited manner. Even in a criminal case the lawyer must seek to persuade the defendant-client to refrain from perjurious testimony. There has been dispute concerning the lawyer’s duty when that persuasion fails. Paragraph (b) requires the lawyer to withdraw rather than offer the client’s false testimony, if this can be done without seriously harming the client.
 Serious harm to the client sufficient to prevent the lawyer’s withdrawal entails more than the usual inconveniences that necessarily result from withdrawal, such as delay in concluding the client’s case or an increase in the costs of concluding the case. The term should be construed narrowly to preclude withdrawal only where the special circumstances of the case are such that the client would be significantly prejudiced, such as by express or implied divulgence of information otherwise protected by Rule 1.6. If the confrontation with the client occurs before trial, the lawyer ordinarily can withdraw. Withdrawal before trial may not be possible, however, either because trial is imminent, or because the confrontation with the client does not take place until the trial itself, or because no other counsel is available. In those rare circumstances in which withdrawal without such serious harm to the client is impossible, the lawyer may go forward with examination of the client and closing argument subject to the limitations of paragraph (b).
Refusing to Offer Proof of a Nonclient Known to Be False
 Generally speaking, a lawyer may not offer testimony or other proof, through a nonclient, that the lawyer knows to be false. Furthermore, a lawyer may not offer evidence of a client if the evidence is known by the lawyer to be false, except to the extent permitted by paragraph (b) where the client is a defendant in a criminal case.