Logical ReasoningDifficulty: Hard

PT111 S4 Q16 Explanation

Publicity campaigns for endangered species

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

TopicsNecessary Assumption

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Stimulus

Publicity campaigns for endangered species are unlikely to have much impact on the most important environmental problems, for while the ease of attributing feelings to large mammals facilitates evoking sympathy for them, it is more difficult to elicit sympathy for other microorganisms on which large ecosystems and agriculture depend.

What this question is testing

Necessary Assumption

Your task

Find the assumption the argument requires in order for its conclusion to hold.

Common trap

Answers that would help the argument but aren't strictly required (sufficient, not necessary).

Winning move

Negate each choice — the right one breaks the argument when negated.

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

The question
16.

Which one of the following is an assumption on which the

Answer choices

  1. Correct57% picked this

    The most important environmental problems involve endangered species other than

    Why this is right

    While the extreme term "the most" would normally scare us on Necessary Assumption, here the idea of "most important environmental problem" is actually one of the New Concepts in the Conclusion. Was the author thinking that the most important environmental problems involved large mammals, or species other than large mammals? Definitely the latter! After all, the evidence is saying, "Sure, publicity campaigns would have no trouble with large mammals -- we could arose people's sympathy for them and thus have a lot of impact on problems relating to them. But ... it's hard to elicit sympathy for other types of organisms, and thus it's unlikely that publicity campaigns will have much impact on the most important problems". We predicted this missing link: "soil microorganisms are an example of a species connected to the most important environmental problems". This answer is just giving us this link in a weird way. Instead of saying "soil microorganisms are among the species involved in the most important problems", this is saying, "large mammals are not among the species involved in the most important problems". If we negated this answer, it would definitely weaken, because we'd be saying "Yo, author -- the most important problems involved large mammals. So what's the problem with publicity campaigns? Why wouldn't they have much impact? Didn't you say it's easy to evoke sympathy for large mammals?"

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

  2. Out of Scope2% picked this

    Microorganisms cannot experience pain or have

    Out of Scope: experience pain Too Strong: cannot The concept of "experiencing pain" is never discussed, so the author hasn't made any assumptions about whether or not microorganisms have that capacity. The argument implies that it's harder for people to attribute feelings to microorganisms, but that doesn't necessarily mean the author thinks that microorganisms don't have feelings.

  3. Too Strong: most effective15% picked this

    Publicity campaigns for the environment are the most effective when they elicit sympathy

    The author is definitely assuming a connection between "eliciting sympathy for a certain organism" and "a publicity campaign having much impact on that organism". But she is specifically thinking, "If it's more difficult to elicit sympathy for an organism, then a publicity campaign is unlikely to have much impact". This answer is making a super extreme claim that the #1 most effective thing a publicity campaign can do is elicit sympathy for an organism. The author hasn't committed to a superlative like that. Would it weaken the argument if #1 were celebrity endorsement and the #2 most effective thing was eliciting sympathy? No. It doesn't matter whether eliciting sympathy is the #1 vs. the #2 most effective mechanism for a publicity campaign. The language we care about is "whether it's likely to have much impact", not "whether it's the #1 most impactful".

  4. Too Strong: ignore23% picked this

    People ignore environmental problems unless they believe the problems will affect creatures with

    This, like (C), is temptingly close to a correct Linking idea but written too strongly. The argument was assuming: "If the environmental problems are not affecting creatures for whom is is relatively easy to sympathize with, then a publicity campaign targeting such creatures is unlikely to have much impact." But saying something is unlikely to have much impact does mean it will do nothing. If people are not moved to change their behavior based on these publicity campaigns, that doesn't mean that they are ignoring the problems. For example, I don't necessarily give money to homeless people holding signs at red lights, but that doesn't mean I'm ignoring them. We can notice something but still choose to not do anything about it.

  5. Too Strong2% picked this

    An organism can be environmentally significant only if it affects large

    Too Strong: only if Out of Scope: environmentally significant We're always worried if a Necessary Assumption answer sounds stronger than what the author needed to assume, but on modern tests there are a lot of correct answers that are phrased in conditional form. So when we see conditionals, we want to look at how they would be diagrammed and ask ourselves if the author made any such reasoning move. This answer is saying If an organism doesn't then it cannot affect large ecosystems ? be environmentally or agriculture significant The author never made this reasoning move. In particular, the author is never talking about whether or not a given organism is environmentally significant. Large mammals might be very environmentally significant, but they aren't part of "the most important environmental problems". Not being part of the biggest problem doesn't mean you're environmentally insignificant. Moreover, we know that soil microorganisms do affect large ecosystems and agriculture, and they do seem significant, since they're assumed to be involved with some of the most important environmental problems. But the argument never created some necessary bond between those two concepts. This is like hearing a paragraph say, "It's harder to feel sorry for other kinds of unemployed workers, such as the sign flippers who were exploited for minimum wage and had to work in the sun all day" and then picking an answer that says we're assuming "an unemployed person is pitiable only if they were exploited for minimum wage and had to work in the sun all day".

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