Rules of Professional Conduct: Rule 1.0--Terminology
(b) “Consult” or “consultation” denotes communication of information reasonably sufficient to permit the client to appreciate the significance of the matter in question.
(c) “Firm” or “law firm” denotes a lawyer or lawyers in a law partnership, professional corporation, sole proprietorship or other association authorized to practice law; or lawyers employed in a legal services organization or the legal department of a corporation or other organization, but does not include a government agency or other government entity. See Comment, Rule 1.10.
(d) “Fraud” or “fraudulent” denotes conduct that is fraudulent under the substantive or procedural law of the applicable jurisdiction and has a purpose to deceive.
(e) “Informed consent” denotes the agreement by a person to a proposed course of conduct after the lawyer has communicated adequate information and explanation about the material risks of and reasonably available alternatives to the proposed course of conduct.
(f) “Knowingly,” “known,” or “knows” denotes actual knowledge of the fact in question. A person’s knowledge may be inferred from circumstances.
(g) “Law clerk” denotes a person, typically a recent law school graduate, who acts, typically for a limited period, as confidential assistant to a judge or judges of a court; to an administrative law judge or a similar administrative hearing officer; or to the head of a governmental agency or to a member of a governmental commission, either of which has authority to adjudicate or to promulgate rules or regulations of general application.
(h) “Matter” means any litigation, administrative proceeding, lobbying activity, application, claim, investigation, arrest, charge or accusation, the drafting of a contract, a negotiation, estate or family relations practice issue, or any other representation, except as expressly limited in a particular rule.
(i) “Partner” denotes a member of a partnership, a shareholder in a law firm organized as a professional corporation or professional limited liability company, or a member of an association authorized to practice law.
(j) “Reasonable” or “reasonably” when used in relation to conduct by a lawyer denotes the conduct of a reasonably prudent and competent lawyer.
(k) “Reasonably should know” when used in reference to a lawyer denotes that a lawyer of reasonable prudence and competence would ascertain the matter in question.
(l) “Screened” denotes the isolation of a lawyer from any participation in a matter through the timely imposition of procedures within a firm that are reasonably adequate under the circumstances to protect information that the isolated lawyer is obligated to protect under these Rules or other law.
(m) “Substantial” when used in reference to degree or extent denotes a material matter of clear and weighty importance.
(n) “Tribunal” denotes a court, an arbitrator in a binding arbitration proceeding, or a legislative body, administrative agency, or other body acting in an adjudicative capacity. A legislative body, administrative agency or other body acts in an adjudicative capacity when a neutral official, after the presentation of evidence or legal argument by a party or parties, will render a binding legal judgment directly affecting a party’s interests in a particular matter.
(o) “Writing” or “written” denotes a tangible or electronic record of a communication or representation, including handwriting, typewriting, printing, photo stating, photography, audio or video recording, and e-mail. A “signed” writing includes an electronic sound, symbol or process attached to or logically associated with a writing and executed or adopted by a person with the intent to sign the writing.
“Fraud” or “fraudulent”
 When used in these Rules, the terms “fraud” or “fraudulent” refer to conduct that is characterized as such under the substantive or procedural law of the applicable jurisdiction and has a purpose to deceive. This does not include merely negligent misrepresentation or negligent failure to apprise another of relevant information. For purposes of these Rules, it is not necessary that anyone has suffered damages or relied on the misrepresentation or failure to inform.
 Many of the Rules of Professional Conduct require the lawyer to obtain the informed consent of a client or other person (e.g., a former client or, under certain circumstances, a prospective client) before accepting or continuing representation or pursuing a course of conduct. See, e.g., Rules 1.2(c), 1.6(e) and 1.7(c)(1). The communication necessary to obtain such consent will vary according to the Rule involved and the circumstances giving rise to the need to obtain informed consent. The lawyer must make reasonable efforts to ensure that the client or other person possesses information reasonably adequate to make an informed decision. Ordinarily, this will require communication that includes a disclosure of the facts and circumstances giving rise to the situation, any explanation reasonably necessary to inform the client or other person of the material advantages and disadvantages of the proposed course of conduct and a discussion of the client’s or other person’s options and alternatives. In some circumstances it may be appropriate for a lawyer to advise a client or other person to seek the advice of other counsel. A lawyer need not inform a client or other person of facts or implications already known to the client or other person; nevertheless, a lawyer who does not personally inform the client or other person assumes the risk that the client or other person is inadequately informed and the consent is invalid. In determining whether the information and explanation provided are reasonably adequate, relevant factors include whether the client or other person is experienced in legal matters generally and in making decisions of the type involved, and whether the client or other person is independently represented by other counsel in giving the consent. Normally, such persons need less information and explanation than others, and generally a client or other person who is independently represented by other counsel in giving the consent should be assumed to have given informed consent. In all circumstances, the client’s consent must be not only informed but also uncoerced by the lawyer or by any other person acting on the lawyer’s behalf.
 Obtaining informed consent will usually require an affirmative response by the client or other person. In general, a lawyer may not assume consent from a client’s or other person’s silence. Consent may be inferred, however, from the conduct of a client or other person who has reasonably adequate information about the matter. A number of Rules require that a person’s consent be in writing. See Rules 1.8(a)(3) and 1.8(g). For a definition of “writing,” see Rule 1.0(o).
 This definition applies to situations where screening of a personally disqualified lawyer is permitted to remove imputation of a conflict of interest under Rules 1.11, 1.12 or 1.18.
 The purpose of screening is to assure the affected parties that confidential information known by the personally disqualified lawyer remains protected. The personally disqualified lawyer should acknowledge the obligation not to communicate with any of the other lawyers in the firm with respect to the matter. Similarly, other lawyers in the firm who are working on the matter should be informed that the screening is in place and that they may not communicate with the personally disqualified lawyer with respect to the matter. Additional screening measures that are appropriate for the particular matter will depend upon the circumstances. To implement, reinforce and remind all affected lawyers of the presence of the screening, it may be appropriate for the firm to undertake such procedures as a written undertaking by the screened lawyer to avoid any communication with other firm personnel and any contact with any firm files or other materials relating to the matter, written notice and instructions to all other firm personnel forbidding any communication with the screened lawyer relating to the matter, denial of access by the screened lawyer to firm files or other materials relating to the matter and periodic reminders of the screen to the screened lawyer and all other firm personnel. For a further explanation of screening, see D.C. Bar Legal Ethics Committee Opinion 279.
 In order to be effective, screening measures must be implemented as soon as practical after a lawyer or law firm knows or reasonably should know that there is a need for screening.