A conviction for historical child sexual abuse may be quashed as unreasonable where the complainant's evidence is entirely uncorroborated, her sisters who were in a position to corroborate did not do so, and documentary and video evidence is fundamentally inconsistent with the complainant's account of her relationship with the accused. The combined effect of multiple factors, none individually decisive, may give rise to a reasonable doubt that the jury ought to have experienced and that cannot be dispelled by the jury's advantage in seeing and hearing the witnesses.
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