Rule 18

(a) Relevant evidence is that which:(1) Tends to make the existence of any fact in controversy or necessary for the adjudication of the action more probable or less probable than it would be without such evidence, or(2) is useful to challenge or sustain the credibility of a witness or deponent.(b) All relevant evidence is admissible, except as otherwise provided by these rules or by statute. Evidence which is not relevant is not admissible. History —Amended on Sept. 29, 2004, No. 504, § 1.