Does a court have to go beyond inference and into the realm of speculation to find support for a judgment?

Although a reviewing court "may not 'go beyond inference and into the realm of speculation in order to find support for a judgment'" (People v. Memro (1985) 38 Cal.3d 658, 695, disapproved on another point in People v. Gaines (2009) 46 Cal.4th 172, 181), "[i]f the circumstances reasonably justify the jury's findings, the reviewing court may not reverse the judgment merely because it believes that the circumstances might also support a contrary finding." (People v. Ceja (1993) 4 Cal.4th 1134, 1139.)