What is the test for apportionment of liability?

With particular reference to a case involving an apportionment of liability, the principle was clearly set forth by Dickson, J., in Asody v. Taylor (1974), 1974 CanLII 21 (SCC), 3 N.R. 381; 49 D.L.R.(3d) 724 (S.C.C.), at page 728 where he stated that: "...Except in a strong and exceptional case, an appellate court will not feel free to substitute its apportionment of fault for that made by the trial judge unless there has been palpable and demonstrable error in appreciation of the legal principles to be applied or misapprehension of the facts by the trial judge."