What is the test for reversal of a judgment in a personal injury case?

Consequently, "[c]onflicts and even testimony which is subject to justifiable suspicion do not justify the reversal of a judgment, for it is the exclusive province of the trial judge or jury to determine the credibility of a witness and the truth or falsity of the facts upon which a determination depends. [Citation.]" ( People v. Huston, supra, 21 Cal.2d at p. 693, 134 P.2d 758.) "Testimony may be rejected only when it is inherently improbable or incredible, i.e., ' "unbelievable per se," ' physically impossible or ' "wholly unacceptable to reasonable minds." ' " ( Oldham v. Kizer (1991) 235 Cal.App.3d 1046, 1065, 1 Cal.Rptr.2d 195.)