British Columbia, Canada
The following excerpt is from Birkich v. Cantafio, 2016 BCSC 40 (CanLII):
As I have already stated at the beginning of these reasons, the basic test for determining causation remains the "but for" test. This applies to multi-cause injuries (Athey v. Leonati, 1996 CanLII 183 (SCC), [1996] 3 S.C.R. 458 at paras. 13-14). Throughout, the plaintiff bears the burden of showing that "but for" the negligent act or omission of a defendant, the injury would not have occurred.
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