In an important ruling for tort litigation, the Supreme Court of Canada today allowed an appeal from a decision of the Alberta Court of Appeal which dealt with the issues of “foreseeability” and “causation”. In the course of its reasons, the Court put the brakes on what some might view as the ascendancy of the “material contribution” test of causation.
In Resurfice Corp v. Hanke, the plaintiff had been severely burned while operating an ice-resurfacing machine. Water had been mistakenly introduced into the gasoline tank of the engine. The explosion and fire resulted from vapourized gasoline escaping and being ignited by an overhead heater.
The plaintiff sued the manufacturer and distributor of the resurfacing machine. His case against them was based on the allegation that the water and gasoline tanks on the machine were situated too close together and were similar in appearance, making it easy to confuse them.
However, in the course of his evidence at trial, the plaintiff admitted that he knew the difference between the two tanks. The trial judge found that he had not, in fact, been confused.
Accordingly, at trial, the action was dismissed. The trial judge said that the plaintiff had failed to show that it had been reasonably foreseeable, that an operator of the ice-resurfacing machine would mistake one tank for the other. He also held that the plaintiff had not proved that the defendants had caused the accident.
On appeal to the Alberta Court of Appeal, a new trial was ordered. The Court of Appeal held that the trial judge had erred in both his foreseeability and his causation analyses.
The Supreme Court of Canada said that the Court of Appeal was wrong and it restored the trial judgment, dismissing the action.
Foreseeability
The disposition of this issue turned largely on the facts. The Court of Appeal felt that the trial judge had not analyzed the evidence properly, failing to give proper weight to some parts of it. The Supreme Court disagreed, finding that the Court of Appeal had been wrong to interfere. One interesting aspect of this part of the case was that the Court of Appeal had said that the trial judge had “failed to to consider policy matters, namely the seriousness of the injury and the relative financial positions of the parties”. The Supreme Court did not mince words in rejecting such an approach:
Foreseeability depends on what a reasonable person would anticipate, not on the seriousness of the plaintiff’s injuries (as in this case) or the depth of the defendant’s pockets.
Causation
The more significant part of today’s judgment was on the issue of causation. The Court of Appeal had suggested that where there is more than one potential cause of an injury, the “material contribution” test must be used and that the trial judge had erred in failing to do so. The Supreme Court disagreed, saying that the Court of Appeal was wrong:
To accept this conclusion is to do away with the “but for” test altogether, given that there is more than one potential cause in virtually all litigated cases of negligence. If the Court of Appeal’s reasons in this regard are endorsed, the only conclusion that could be drawn is that the default test for cause-in-fact is now the material contribution test. This is inconsistent with this Court’s judgments in Snell v. Farrell, [1990] 2 S.C.R. 311, Athey v. Leonati, at para. 14, Walker Estate v. York Finch General Hospital, [2001] 1 S.C.R. 647, 2001 SCC 23, at paras. 87-88, and Blackwater v. Plint, [2005] 3 S.C.R. 3, 2005 SCC 58, at para. 78.