WeakenDiff: Medium
Logic Breakdown
Passage Summary: A repair shop found that, relative to how many are sold, ProBit computers are brought in for service much less often than KRV computers, so they conclude ProBit is the better-built brand.
Conclusion: ProBit is a more reliable brand of personal computer than the KRV brand.
Reasoning: After adjusting for market share, an independent service company found that ProBit computers had the lowest proportion of service requests while KRV had the highest.
Analysis: The argument assumes that service requests at one independent shop are a perfect proxy for overall reliability. However, this ignores other reasons a computer might not end up at that specific shop. Perhaps ProBit owners are more likely to use the manufacturer's own warranty service, or maybe ProBit computers are so inexpensive that owners simply replace them rather than seeking repairs. Look for an answer that provides an alternative explanation for the low volume of service requests.
Conclusion: ProBit is a more reliable brand of personal computer than the KRV brand.
Reasoning: After adjusting for market share, an independent service company found that ProBit computers had the lowest proportion of service requests while KRV had the highest.
Analysis: The argument assumes that service requests at one independent shop are a perfect proxy for overall reliability. However, this ignores other reasons a computer might not end up at that specific shop. Perhaps ProBit owners are more likely to use the manufacturer's own warranty service, or maybe ProBit computers are so inexpensive that owners simply replace them rather than seeking repairs. Look for an answer that provides an alternative explanation for the low volume of service requests.
Passage Stimulus
Passage Redacted
Unlock Full Passage12.Which one of the following, if true, most seriously weakens the argument?
Correct Answer
B
If for some brands most service requests go to the manufacturer rather than to an independent company, then the independent company’s tallies are not comparable across brands. A brand could look reliable simply because its customers don’t call this company, undermining the conclusion that ProBit is more reliable.
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