The respondent was assaulted at work and claimed benefits for traumatic vertebrobasilar ischemia (TVBI).
The Workplace Safety and Insurance Appeals Tribunal denied the claim, preferring medical evidence that the assault did not cause TVBI.
The Tribunal later upheld its decision on reconsideration after reviewing new evidence from a co-worker.
The Divisional Court quashed the reconsideration decision as patently unreasonable.
On appeal, the Court of Appeal allowed the appeal and reinstated the Tribunal's decision, finding that the Tribunal had properly considered the evidence, resolved the conflicting medical opinions, and reached a reasonable conclusion.