Under s 5B(2)(d) of the Civil Liability Act 2002 (NSW), the social utility to be considered is that of the specific activity creating the risk of harm, not the general activity within which it occurs — the social utility of operating a gym does not reduce the precautions required against risks created by a specific exercise. The Fox v Percy constraints on appellate intervention apply to expert evidence rejected on reliability grounds after oral testimony and cross-examination, in the same way they apply to lay witness credibility findings. A party cannot rely on appeal on evidence tendered at trial on a limited basis (here, causation only) for a broader purpose (liability).
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