Logical ReasoningDifficulty: Easy

PT113 S2 Q24 Explanation

Roxanne: To protect declining elephant

A free, expert breakdown of this official LSAT Logical Reasoning question.

TopicsPrinciple-Strengthen

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Stimulus

Roxanne: To protect declining elephant herds from poachers seeking to obtain ivory, people concerned about such endangered species should buy no new ivory. The new ivory and old ivory markets are entirely independent, however, so purchasing antique ivory provides no incentive to poachers to obtain more new least 75 years old-can be bought in good conscience.

Salvador: Since current demand for antique ivory exceeds the supply, many people who are unconcerned about endangered species but would prefer to buy antique ivory are buying new ivory instead. People sharing your concern about endangered species, therefore, should ensuring that demand for new ivory will drop.

What this question is testing

Principle-Strengthen

Your task

Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.

Common trap

Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.

Winning move

Predict what a right answer must do, then test each choice against the conclusion-evidence gap.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
24.

Which one of the following principles, if established, would most help to

Answer choices

  1. Bad Conclusion Match2% picked this

    People concerned about endangered species should disseminate knowledge concerning potential threats to those species in order to convince

    This principle correctly applies to those who are concerned about endangered species. Does it instruct them to refrain from buying any ivory? No it just instructs them to disseminate information about threats to elephants.

  2. Weak Evidence / Conclusion Match5% picked this

    People concerned about endangered species should refrain from buying any products whose purchase could result in harm to those species, but only if acceptable

    This answer sounds more like a rule that instructs conscientious consumers to refrain from buying new ivory. Buying new ivory could result in harm to the elephants, and an acceptable substitute (antique ivory) is available. We, of course, want a rule that will keep them from buying either type of ivory. Could we say that "antique ivory" is a product whose purchase could result in harm to the endangered species? Not directly, but maybe indirectly. But if we assign antique ivory as the "product whose purchase could result in harm", then do we meet the required condition of this rule that "there is an acceptable substitute for antique ivory"? No. So it's hard to make this rule work either way we slice it.

  3. Bad Conclusion Match5% picked this

    People concerned about endangered species should refrain from the purchase of all manufactured objects produced from those species, except for those objects already in

    This rule forbids a conscientious consumer from buying new ivory, but it carves out an exception for antique ivory (objects already in existence when the species endangered). We need a rule that doesn't give them this exception permission for antique ivory. It's supposed to convince them not to buy any ivory.

  4. Bad Conclusion / Evidence Match1% picked this

    People concerned about endangered species should refrain from participating in trade in products produced from those species, but only if workers engaged in that

    This rule says that conscientious consumers should refrain from participating in trade for certain products. We want a principle that says they should refrain from buying certain products. That seems like a weird language stretch, to think that buying X is the same as participating in trade in X. Also, this rule has a requirement that workers engaged in the ivory trade also agree to some restraint, and that doesn't match anything in Salvador's argument.

  5. Correct86% picked this

    People concerned about endangered species should act in ways that there is reason to believe will help reduce the undesirable results of the actions

    Why this is right

    This rule says that conscientious consumers should act in certain ways, and we need that way to be "acting in the way where you refrain from buying any ivory" (it's a little weird to say you're acting in a certain way by refraining from doing something, but we do use that expression like that sometimes. "Act like a professional" / "Act like a lady / gentleman" / "Act like you belong" are all expressions that are usually used to tell someone to refrain from behaving a certain way). Okay, can we match up "refraining from buying all ivory" with the rest of this answer? Is there reason to believe that refraining from buying all ivory will help reduce the undesirable results of the actions performed by people who do not share that concern? Yeesh. Is there reason to think that if we avoid buying all ivory, people who are not as conscientious about avoiding new ivory will buy it less? Yes. These people, we're told, prefer antique if they can find it. So if we refrain from buying up antique ivory, then there will be more antique ivory supply for when these other people come looking for some, and if they find antique ivory then they are less likely to buy new ivory, which has the undesirable result of incentivizing poaches to kill more elephants. These answers were all very complicated. The easiest way to find the correct one would be to understand that Salvador was making a case to conscientious people based on what non-conscientious people would be likely to do. His argument is, "Don't do X, because if you do X, then that will lead these other people to do Y, which we know you don't want". This is the only answer that reflects that notion of "refrain from doing X, because doing X would cause other people to do Y."

    Skill tested: Principle-Strengthen · how this choice captures the argument's function is the move to repeat next time.

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