What is the standard of review for questions of mixed fact and law?

The standard of review with respect to questions of mixed fact and law are assessed on the standard of reasonableness as set out in Dunsmuir v. New Brunswick, 2008 SCC 9, para 47: In judicial review, reasonableness is concerned mostly with the existence of justification, transparency and intelligibility within the decision-making process. But it is also concerned with whether the decision falls within a range of possible, acceptable outcomes which are defensible in respect of the facts and law. Analysis