What is sufficient evidence to overturn a jury's verdict in a sexual assault case?

In determining whether sufficient evidence supports a conviction, "we review the whole record to determine whether any rational trier of fact could have found the essential elements of the crime or special circumstances beyond a reasonable doubt. [Citation.] The record must disclose substantial evidence to support the verdicti.e., evidence that is reasonable, credible, and of solid valuesuch that a reasonable trier of fact could find the defendant guilty beyond a reasonable doubt. [Citation.] In applying this test, we review the evidence in the light most favorable to the prosecution and presume in support of the judgment the existence of every fact the jury could reasonably have deduced from the evidence. [Citation.] . . . 'We resolve neither credibility issues nor evidentiary conflicts; we look for substantial evidence. [Citation.]' [Citation.] A reversal for insufficient evidence 'is unwarranted unless it appears "that upon no hypothesis whatever is there sufficient substantial evidence to support"' the jury's verdict. [Citation.]" (People v. Zamudio (2008) 43 Cal.4th 327, 357.) The "testimony of a single witness is sufficient to support a conviction" unless it is physically impossible or inherently improbable. (People v. Young (2005) 34 Cal.4th 1149, 1181; see Evid. Code, 411 ["Except where additional evidence is required by statute, the direct evidence of one witness who is entitled to full credit is sufficient for proof of any fact"].)