Okla. Stat. tit. 12 § 2704 : Civil Procedure — Oklahoma Evidence Code — Expert and Opinion Testimony — Opinion on Ultimate Issue TEXT PDF Testimony in the form of an opinion or inference otherwise admissible is not objectionable because it embraces an ultimate issue to be decided by the trier of fact. Okla. Stat. tit. 12, § 2704 Laws 1978, SB 276, c. 285, § 704, eff. 10/1/1978.