A trial judge in a medical negligence case must engage with the central elements of the plaintiff's case on causation, including resolving competing expert evidence as to the specific physiological cause of the plaintiff's residual condition, and must explain why the plaintiff's expert evidence is rejected if it is not accepted. Identifying possibilities and uncertainties without reaching ultimate findings is insufficient. The hypothetical question of what the plaintiff would have done requires a finding based on inference, not merely an observation that it 'cannot be assumed' the plaintiff would have acted in a particular way.
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