Bunuel
Increased use of autonomous delivery drones is sometimes advocated as a safe way to transport packages in crowded urban areas. But opponents of drone delivery point to the 60 incidents involving unexpected loss of control that were reported just last year at two existing drone-delivery companies operating in major cities. Since designs for proposed new drone fleets include no additional safeguards to prevent such losses of control, accidents will only become more prevalent if use of drone delivery increases.
Which of the following, if true, most seriously weakens the argument?
(A) In only a small fraction of the reported incidents did a drone’s loss of control result in property damage or injury.
(B) Other methods of package delivery, such as bicycle couriers, have not been proven less accident-prone than drone delivery.
(C) The current fleets at existing drone-delivery companies are large enough to handle increased delivery volume without any need for new drones.
(D) The frequency of unexpected loss-of-control reports in newly launched drone fleets is about the same as the frequency in older fleets.
(E) At the two companies where losses of control were reported, many drone operators had received only minimal training on how to intervene when automated systems malfunctioned.
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Going through sentence by sentence what the argument is saying:
S1: Drones are a safe way to deliver packages.
S2: But they're not safe, because 60 accidents happened at 2 companies.
S3: Conclusion - New drones aren't going to have better safeguards, thus accidents are going to be more prevalent (note the use of prevalent and not frequent here. Frequency can equal prevalence, but prevalence means widespread, versus frequency which means "more often").
Looking to weaken the argument, so lets see what truly breaks the argument's logic.
Option A: It's not about how much damage was done, it's about the accidents happening at all. Irrelevant, eliminate.
Option B: Bikes having more accidents doesn't have anything to do with drones having accidents. Irrelevant, eliminate.
Option C: The fleets won't buy new drones because they have enough. The new drones don't have upgraded safety features, so model of drone doesn't matter. Irrelevant, eliminate.
Option D: Basically, this says that the percentage of accidents is the same for new and old fleets. This is tempting, but the argument we're trying to break is that accidents are going to be more prevalent. There's some logic to it, but it doesn't cleanly break the argument.
Option E: This is a solid way to break the argument. It essentially says that it's not the equipment that's the problem, it's the operators, so this is a localized and specific problem for these two companies and not an overall problem for the equipment. More drone deliveries will
not equal more prevalent accidents.
Therefore Option E is the answer.