Human settlement of previously uninhabited areas tends to endanger species of wildlife. However, the Mississippi kite, a bird found on the prairies of North America, flourishes in areas that people have settled. In fact, during the five years since 1985 its population has risen far more rapidly in towns than in rural areas.

"Surprising" Phenomenon
Why does the Mississippi kite thrive in areas settled by humans, whereas other wildlife tends to struggle in such areas?

Objective
A hypothesis explaining this pattern must state a difference between the Mississippi kite and other wildlife that includes a distinction between towns and rural areas. This difference will result in kites’ numbers rising more quickly in towns than in rural areas.

A
Residents of prairie towns have been setting off loud firecrackers near kites’ roosting spots because of the birds’ habit of diving at people and frightening them.
This deepens the mystery. If kites are frequently disturbed in towns, then the fact the kites flourish there is even more unexpected.
B
Towns on the prairies tend to be small, with a low density of human population and large numbers of wild birds and animals.
This does not explain why the kites succeed more often in towns than in rural areas. It is not implied that relatively large numbers of wild birds and animals would cause the kites to thrive.
C
Since the international migratory bird protection treaty of 1972, it has been illegal to shoot kites, and the treaty has been effectively enforced.
This states no difference between towns and rural areas that would explain the discrepancy. If the treaty has been enforced everywhere, then kite populations in neither area should be at risk from shooting.
D
Wildlife such as pigeons and raccoons had already adapted successfully to towns and cities long before there were towns on the North American prairies.
This refers to species other than the Mississippi kite. It rules out the possibility that it is impossible for a wild species to adapt to cities and towns, but does not explain why the kites thrive in those places.
E
Trees are denser in towns than elsewhere on the prairie, and these denser trees provide greater protection from hail and windstorms for kites’ nests and eggs.
This explains why the Mississippi kites flourish in towns. Tree cover there is more dense, providing the kites with good habitat.

11 comments

When a major record label signs a contract with a band, the label assumes considerable financial risk. It pays for videos, album art, management, and promotions. Hence, the band does not need to assume nearly as much risk as it would if it produced its own records independently. For this reason, it is only fair for a major label to take a large portion of the profits from the record sales of any band signed with it.

Summarize Argument
It is fair for record labels to take a large portion of the profits from bands that signed with them because the band does not assume nearly as much risk as the label. When a label signs a band, they pay for a variety of highly expensive things and take on a high financial risk.

Identify Argument Part
This is an intermediate conclusion supported by the first sentence, which then supports the main conclusion that it is fair for labels to take large portions of the profits from bands they have signed.

A
It is the only conclusion that the argument attempts to establish.
This is not the only conclusion of the argument. It is an intermediate conclusion that supports the main conclusion that it is fair for labels to take a large cut of the profits from signed bands.
B
It is one of two unrelated conclusions, each of which the same premises are used to support.
The two conclusions are related and are supported differently. This conclusion is supported by the first sentence. The main conclusion is then supported by this sub-conclusion.
C
It is a general principle from which the argument’s conclusion follows as a specific instance.
This is not a general principle. It is a sub-conclusion that is supported by the fact that labels take on a considerable amount of risk when signing a band.
D
It describes a phenomenon for which the rest of the argument offers an explanation.
This is not a phenomenon that the rest of the argument seeks to explain. It is part of the reasoning that leads to author uses to justify their conclusion.
E
Premises are used to support it, and it is used to support the main conclusion.
The author supports the idea that a band signed with a major label does not need to assume as much risk. This sub-conclusion is then used to support the main conclusion that it is fair for the label to take a large portion of the profits.

3 comments

Commentator: Recently, articles criticizing the environmental movement have been appearing regularly in newspapers. According to Winslow, this is due not so much to an antienvironmental bias among the media as to a preference on the part of newspaper editors for articles that seem “daring” in that they seem to challenge prevailing political positions. It is true that editors like to run antienvironmental pieces mainly because they seem to challenge the political orthodoxy. But serious environmentalism is by no means politically orthodox, and antienvironmentalists can hardly claim to be dissidents, however much they may have succeeded in selling themselves as renegades.

Summary

Winslow believes that articles criticizing the environmental movement have been appearing in newspapers due to the desire of newspaper editors for articles that seem to challenge prevailing political positions. The commentator concedes that editors like to run antienvironmental pieces primarily because they like to challenge prevailing positions. But the commentator asserts that, despite what news editors might think, environmentalism isn’t actually the prevailing position.

Strongly Supported Conclusions

Newspaper editors are selecting some stories on the basis of an inaccurate understanding of what is a prevailing position.

At least some people have an inaccurate understanding about the prevalence of serious environmentalism.

A
Winslow is correct about the preference of newspaper editors for controversial articles.

Strongly supported. The commentator acknowledges that editors like to run antienvironmental pieces because they like to challenge what they perceive to be prevailing positions. This preference can be characterized as a preference for “controversial” pieces.

B
Critics of environmentalism have not successfully promoted themselves as renegades.

Unsupported. The commentator asserts that antienvironmentalists are not actually dissidents, “however much they may have succeeded” in selling themselves as renegades. This acknowledges the critics may have succeeded in portraying themselves as renegades.

C
Winslow’s explanation is not consonant with the frequency with which critiques of environmentalism are published.

Unsupported. The commentator supports Winslow’s explanation about why newspaper editors have regularly published antienvironmentalist pieces. So, the stimulus doesn’t support a claim that the explanation is inconsistent with anything.

D
The position attacked by critics of environmentalism is actually the prevailing political position.

Antisupported. The commentator says that serious environmentalism is not the prevailing position. So, the position attacked by critics of environmentalism is not the prevailing position.

E
Serious environmentalism will eventually become a prevailing political position.

Unsupported. The commentator doesn’t say anything about the future of serious environmentalism.


23 comments

Publisher: The new year is approaching, and with it the seasonal demand for books on exercise and fitness. We must do whatever it takes to ship books in that category on time; our competitors have demonstrated a high level of organization, and we cannot afford to be outsold.

Summarize Argument
The publisher contends that his company must ensure timely shipping for exercise and fitness books as the new year approaches. He notes that his competitors are well-organized, and his company risks being outsold if it doesn’t match the competitors’ efficiency.

Identify Conclusion
The conclusion is the publisher’s directive that the company “must do whatever it takes” to ship exercise and fitness books on time.

A
The company should make shipping books its highest priority.
The publisher argues that shipping exercise and fitness books on time is crucial but not that it’s the "highest priority." The company can have higher priorities so long as it timely ships the books. Moreover, the conclusion only discusses shipping specific books, not all books.
B
By increasing its efficiency, the company can maintain its competitive edge.
The publisher doesn't make this argument. He concludes that shipping exercise and fitness books "on time" is crucial but doesn’t specify how to achieve it. The company might already be efficient, and the publisher could be reinforcing the need to maintain that efficiency.
C
The company will be outsold if it does not maintain its competitors’ high level of organization.
The publisher does not make this argument. The publisher concludes the company "cannot afford to be outsold," but doesn't claim the company will be if it doesn’t match its competitors' organization. The company may not need the same level of organization to ship books on time.
D
It is imperative that the company ship fitness and exercise books on time.
This is a good summary of the argument’s main conclusion. The publisher concludes that it is necessary, or “imperative,” that the company ship its fitness and exercise books on time because it cannot afford to be outsold by its competitors.
E
The company should do whatever is required in order to adopt its competitors’ shipping practices.
The publisher does not make this argument. The publisher concludes the company must ship exercise and fitness books on time, not that it must follow its competitors' shipping practices. The company may already have better shipping practices that ensure timely shipping.

2 comments