Mr. Roberts, a Certified Specialist in Workplace Safety and Insurance Law, reflects on a recent Supreme Court of Canada (SCC) decision. It is rare to see a Workers' Compensation matter before the SCC. In the BC v. Fraser Health matter, the SCC clarified the standard of proof for causation in occupational disease claims. Further, the SCC reinforced that a high degree of deference may be given to tribunal decisions for a judicial review regarding the "patently unreasonable" test.