ABB Inc. v. Domtar Inc.,  3 SCR 461, 2007 SCC 50 (CanLII)
Issue: What are the conditions for the existence of latent defects and how to evaluate whether a defect is hidden or not. Complete Decision.
Decision: Whether a defect is hidden or not is assessed objectively. One must review the buyer’s examination of the good in light of what a prudent and diligent buyer of identical expertise would have done. In other words, the issue is not limited to ignorance of the defect; it must also be determined whether a reasonable buyer in the same circumstances would have realized that there was a defect.