If the defendant breaches a contract it bears the onus of proving that the plaintiff unreasonably failed to mitigate its loss (see: Red Deer College v. Michaels, 1975 CanLII 15 (SCC),  2 S.C.R. 324). This entails establishing on a balance of probabilities two steps of proof: that the opportunities to mitigate were available to the plaintiff and that the plaintiff unreasonably failed to pursue them.
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