OFFICIALEXPLANATION
The stimulus is prefaced by the word “advertisement.” One quirk of the GMAT is that every stimulus in GMAT history that has been preceded by this word has contained faulty or deceptive logic. Thus, whenever you see this word prefacing a stimulus, be on the lookout for misleading or flawed reasoning. The argument is constructed asfollows:
- Premise: At most jewelry stores, the person assessing the diamond is the person selling it.
Premise/Sub-conclusion:
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