The evidentiary onus principles on causation in failure-to-warn cases stated in Chappel v Hart (1998) 72 ALJR 1344 are confined to medical negligence and do not apply in general negligence cases where the plaintiff knew of the risk and could have avoided it by performing the task differently. An employer is not required to warn an experienced employee of obvious and known risks where the employee exercises discretion in the mode of performing work, and there is no identifiable practical step the employer could take to reduce the risk.
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