Kansas Statutes Chapter 60. Procedure, Civil § 60-419. Prerequisites of knowledge and experience

As a prerequisite for the testimony of a witness on a relevant or material matter, there must be evidence that he or she has personal knowledge thereof, or experience, training or education if such be required. Such evidence may be by the testimony of the witness himself or herself. The judge may reject the testimony of a witness that the witness perceived a matter if the judge finds that no trier of fact could reasonably believe that the witness did perceive the matter. The judge may receive conditionally the testimony of the witness as to a relevant or material matter, subject to the evidence of knowledge, experience, training or education being later supplied in the course of the trial.