Final answer:
A seller's opinion can be construed as a warranty when it is included in the contract or when it relates to a hidden defect.
Step-by-step explanation:
When a seller's opinion is construed as a warranty depends on a few factors. One of these factors is if the opinion is included in the contract. If the seller's opinion is written into the contract, it can be viewed as a warranty. Another factor is if the seller's opinion relates to a hidden defect. If the seller provides an opinion on a hidden defect, it can also be considered a warranty.