Rule 602.
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/mt/title-26/chapter-10/part-6/602·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
Rule 602 . Lack of personal knowledge.
A witness may not testify as to a matter unless evidence is introduced sufficient to support a finding that the witness has personal knowledge of the matter. Evidence to prove personal knowledge may, but need not, consist of the witness' own testimony. This rule is subject to the provisions of Rule 703, relating to opinion testimony by expert witnesses.