Dunsmuir v New Brunswick
Dunsmuir v New Brunswick,  2008 SCC 9, [2008] 1 SCR 190 was, prior to Canada (Minister of Citizenship and Immigration) v Vavilov, the leading Supreme Court of Canada decision on the topic of substantive review and standards of review. Dunsmuir is notable for combining the reasonableness (simpliciter) and the patent unreasonableness standards of review into a single reasonableness standard.