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TOPIC: ARGUMENT131 - The following appeared in an environmental newsletter published in Tria Island.
"The marine sanctuary on Tria Island was established to protect certain marine mammals. Its regulations ban dumping and offshore oil drilling within 20 miles of Tria, but fishing is not banned. Currently many fish populations in Tria's waters are declining, a situation blamed on pollution. In contrast, the marine sanctuary on Omni Island has regulations that ban dumping, offshore oil drilling, and fishing within 10 miles of Omni and Omni reports no significant decline in its fish populations. Clearly, the decline in fish populations in Tria's waters is the result of overfishing, not pollution. Therefore, the best way to restore Tria's fish populations and to protect all of Tria's marine wildlife is to abandon our regulations and adopt those of Omni."
WORDS: 563 TIME: 0:55:00 DATE: 2007-6-18
In this argument, the arguer attributes the decline in fish population in Tria’s water to overfishing rather than pollution, based on the comparison between the marine sanctuary of Tria and Omni, and thus suggesting Tria should adopt the policies of Omni. Well-grounded reasoning it may seem, however, close scrutiny reveals that the argument suffers from several fallacies, and is therefore unconvincing.
To begin with, the author fails to rule out the possibility that it is pollution that caused the fish populations in Tria’s water to decline. He seems to have deduced that pollution is not even one of the reasons from the comparison between Tria and Omni, where Omni adopts a sanctuary less strict than Tria’s; this, however, lends little support to that assumption. The argument actually provides no information concerning the original environmental conditions in either place, thus it is entirely possible that the pollution level in Omni was low even before any regulation was enforced. Also possible is that the Island of Omni locates in some quick-water place, where the water flows takes away most of the rubbish and oil, while for Tria contaminated flow only brings more waste matters that accumulates in its area. Either case, then, would call on the necessity to adopt even more strict sanctuary in Tria, and hence disprove the arguer’s assumption.
Conceded that pollution is not the reason of declining fish populations in Tria, the arguer’s assumption that the decline results from overfishing is still unwarranted. No information is provided in the argument regarding fishing conditions in Tria, and now we might question whether fishing exist in Tria’s water at all in the first place. Assuming that fishery is originally unthrifty in Tria, a sanctuary of banning is rendered needless. Besides, there are alternatives that might explain the decrease, for example, changing direction of ocean current that drives away the fish populations originally resided in Tria’s water, or introduction of the fish’s natural preyers into the water. Unless the arguer can prove that overfishing actually is the reason why fish populations decrease, and that bans of fishing is necessary in Tria, the conclusions drawn is unconvincing.
Last but not the least, even if the arguer does find the right cause of the decline of fish populations in Tria's waters, he commits an either-or fallacy in assuming that the only possible solutions to the problem are the marine sanctuaries of Tria and Omni. There might be other methods to better protect the fish populations in Tria, such as regulations that address at decrease the number of visitors to the coast and the near ocean, or both bans on dumping and oil drilling within 20 miles, and those on fishing. Indeed, it is false analogous to suggest that abandoning the current regulations and adopting those of Omni will be of effective protection for the fish populations in Tria to begin with, for the reason that the varies differences in both environmental and cultural conditions between the two islands might limit the efficiency of the same sanctuary on Tria.
To sum up, the argument is groundless as it stands. To substantiate the conclusion, the arguer needs to provide more evidence about the quantity of fishing activities in Tria's water as well as information about the water quality there. The arguer should also provide evidence to show the comparability between Omni and Tria's which may determine the effectiveness of adopting similar regulations. |
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