What is the test for substantial evidence in a sexual assault case?

The role of the appellate court in applying the substantial evidence test is well established. It is to determine whether there is substantial evidence to support the conclusions of the trier of fact and not whether guilt is established beyond a reasonable doubt. (People v. Redmond (1969) 71 Cal.2d 745, 755, 79 Cal.Rptr. 529, 457 P.2d 321.) To this end, the appellate court must view the evidence in the light most favorable to respondent and before the judgment can be reversed, it must clearly appear that upon no reasonable hypothesis whatever is there substantial evidence to support it.