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#26189
Complete Question Explanation

Method of Reasoning—AP. The correct answer choice is (D)

The argument/counterargument structure of the stimulus can be summarized as follows:


Anti-conclusion: As the number of active landfills consequently dwindles over the coming decade, there will inevitably be a crisis in landfill availability.

Counterpremise: The prediction relies on the unlikely assumption that no new landfills will open as currently active ones close.

Conclusion: The prediction is unsound.


The question stem here restates the claim about the crisis in landfill availability mentioned in the stimulus, and then asks what role that claim plays in the argument. Whenever a question stem quotes back text from the stimulus and asks you what “role” or what “part” that text plays in the argument, then you are dealing with a Method of Reasoning—Argument Part question.

The stimulus presents a common device used in many LSAT stimuli. The second sentence begins with the phrase “Some people maintain…” This is a variation on the classic “Some people argue…” construction. Whenever you see this type of construction, it is almost always used to introduce the argument of some other individual or group to which the author does not belong. In almost every case, the author proceeds to disagree with whatever that particular argument states. The stimulus here is no exception. Here, the “some people” are arguing that there will inevitably be a crisis in landfill availability and the author clearly disagrees.

Note the other common linguistic device used in these types of arguments: the word “however.” It is common to see the author introduce this other group’s argument, and follow that argument with the words “but” or “however.” This provides a very distinct shift in direction that sets off the author’s ultimate disagreement with the original argument.

Answer Choice (A): The claim about the inevitable crisis does not follow from the first sentence. It actually follows from the fact provided at the beginning of the second sentence that the number of landfills will dwindle over the coming decade.

Always take time to pin down exactly what the answer choice is saying in Method of Reasoning questions. The abstraction of the language can be difficult, and the more specific you can be with what the statement in the answer choice addresses, the easier it is to eliminate clear loser answer choices. Here, answer (A) is saying essentially that the claim about the landfill crisis is concluded from the premise that landfills are designed to own ten years’ worth of waste. This is clearly not an accurate description of the stimulus and is therefore wrong.

Answer Choice (B): The main conclusion of the argument is the last sentence of the stimulus, not the sentence cited in the question stem. Remember, the “main conclusion” will always refer to the author’s conclusion, not to the conclusion of any other party in the stimulus. So, while the claim about the landfill crisis is the conclusion for the argument made by “some people”, it does not reflect the main conclusion of the author’s argument. Ultimately, the author here concludes that the claim about the inevitable crisis is unsound.

Answer Choice (C): This answer choice is incorrect, as it suggests the claim about the landfill crisis proves the author’s conclusion. This is another way of saying that the statement justifies the conclusion of the author’s argument. The author’s conclusion is in no way supported by this claim. It is in direct opposition to it. Thus this answer is also incorrect.

Answer Choice (D): This is the correct answer choice. The author ultimately concludes that the claim about the inevitable crisis in landfill availability is unsound. In other words, she is attacking, or casting doubt, on the claim about the landfill availability crisis.

Answer Choice (E): The statement is not an intermediate conclusion of the argument. An intermediate conclusion is a conclusion the author arrives at based on premises in the argument, which is in turn used to support the main conclusion of the argument. In other words, an intermediate conclusion serves a dual role as both a premise and a conclusion of the author’s argument. Here, the author argues against the claim in question. While the claim about the crisis in landfill availability is a conclusion, it is not a conclusion arrived at by the author; it is held by a different group of people. Also, the claim does not support the author’s main conclusion in any way. For these reasons, the claim is not an intermediate conclusion and the answer choice is incorrect.
 lathlee
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#25459
How can I distinguish Other than PR and Conc in Method-AP

"4. Ecologist: Landfills are generally designed to hold ten years’ worth of waste.."

Admin edit: due to LSAC policies and copyright law, complete LSAT questions cannot be posted online. However, posting in this section of the forum (Test Explanations) immediately identifies the question, and eliminates the need for the text to be posted. Note: you can quote small sections of the question as needed for your question.

According to answer sheet, the correct answer is D).
These are my problems:
Issue number 1: in logical reasoning bible of ch 12 of method of reasoning part, it trains how to distinguish and separate main, sub conclusion, supporting premises and counter premises, so whenever I faced with method-ap questions, I only select answer choices that deal with main, sub conclusion, supporting premises and counter premises as explicitly stated as name tags, main conclusion and sub conclusion. How can I prepare method-ap questions better

Issue Number 2: I assume that answer choice d) and the part of that “there will be a crisis in landfill availability plays” function as counter premise. Am I correct on this ?
Issue Number 3: I still don’t understand how to solve this problem. what is the textbook approach for this question?
 Jon Denning
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#25575
Hey lathlee,

Thanks for the question! You've named most of the common elements that appear in arguments on the LSAT, but there are a few others (as this question demonstrates). One of the pieces you'll sometimes see is an idea or belief that the author mentions in order to argue against it. That's what we have here. It's not a counter-premise per se (those are ideas that dispute a premise of the argument), but rather something bigger: another group's conclusion that the author's whole argument is meant to discredit.

Specifically, the conclusion in the last sentence is that the "prediction"--there will be a crisis in landfill availability--is unsound, meaning the author believes there will NOT be an availability crisis. So that belief with which the author disagrees, and that the question stem references, is provided here specifically to set up the author's argument against it.

When that happens, whether in Method-AP or elsewhere, it's important to recognize and note its function: namely, to establish some idea that the argument is attempting to disprove/undermine. So knowing that that can be an element in argumentation, just like premises, conclusions, intermediate conclusions, and the rest should be sufficient for you to correctly answer this subcategory of questions in the future :)

I hope that helps!
 lathlee
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#26228
thank you so much for continuous and thoughtful responses.

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