They do not and cannot yield ultimate truth. Absolute certainty in matters of causation is a rarity."); Harrison v Lorenz, 303 Mich 382, 391-392; 6 NW2d 554 (1942) ("The testimony of this witness was not rendered incompetent because he could not state with positive certainty as to the exact location of the leak."); Wood v Vroman, 215 Mich 449, 461; 184 NW 520 (1921) ("The plaintiff was not required to prove to an absolute certainty that the infection was caused by the introduction of the germs in the pus."); Birou v Thompson-Brown Co, 67 Mich App 502, 510; 241 NW2d 265 (1976) ("It is not necessary for an expert witness to state an opinion in terms of absolute certainty for it to be admissible."). Aside from the caselaw, the governing statute, MCL 600.2912a(2), provides the applicable standard: "In an action alleging medical malpractice, the plaintiff has the burden of proving that he or she suffered an injury that more probably than not was proximately caused by the negligence of the defendant or defendants."