Logical ReasoningDifficulty: Medium

PT141 S4 Q14 Explanation

Environmentalist: Pollution from gasoline

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

TopicsMost Supported

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Stimulus

Environmentalist: Pollution from gasoline burned by cars contributes to serious environmental problems. But the cost of these problems is not reflected in gasoline prices, and hence usually does not affect consumers' decisions about how much to drive. Heavier taxes and as a result consumers would pollute less.

What this question is testing

Most Supported

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
14.

The environmentalist's statements, if true, most strongly support which one of

Answer choices

  1. Too Strong: unless / should2% picked this

    The cost of pollution from driving should not be reflected in the price of gasoline unless the amount of pollution produced would

    We don't have any way to support the extreme notion that "the only reason you should ever reflect the cost of pollution in the price of gasoline is X", which is what this answer is saying.

  2. Out of Scope: awareness15% picked this

    Heavier taxes on gasoline would increase consumers' awareness of the kinds of environmental problems to which

    The only causal effect of heavier gas taxes that we know of is "consumers would pollute less". We don't know if their awareness of environmental problems would change at all. It might simply be that they see gas is $7 / gallon, they decide to drive less than they used to, and they thereby pollute less.

  3. Correct71% picked this

    Consumers would purchase less gasoline, on average, if the cost of the environmental problems to which pollution from driving contributes were fully

    Why this is right

    This is really just fleshing out the meaning of "as a result consumers would pollute less". In the world where we raise heavier taxes on gasoline until the price of gas fully reflects the cost of the environmental problems caused by pollution from cars, we know that "consumers would pollute less". Well, what do we think they mean by 'pollute less'? Consumers would stop setting garbage on fire in their backyard? They would stop throwing litter into the local river? No, it's implied that they would be polluting less by buying less gas, now that it's much more expensive to do so. This is definitely a Most Supported, not a Must Be True answer, but even though it has some loose ends, it effectively captures an idea that was implied by the paragraph.

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

  4. Too Strong: the only8% picked this

    The only cost considered by most consumers when they are deciding how much to drive is

    We can certainly derive that the cost of gasoline is "one cost considered by most consumers", and maybe even that it's "the most significant cost considered" (since we know that raising the cost of gas can influence how much people buy). But we can't support the extreme claim that it is the only cost that most consumers ever consider when deciding how much to drive (for example, if they're considering whether to drive to a vacation spot vs. fly there, they probably consider the cost of flying as well).

  5. Too Strong: only if4% picked this

    Pollution from gasoline burned by cars will be reduced only if consumers give more consideration to the cost of that pollution when

    Not only is this way too strong, since the paragraph doesn't say "the only way to reduce pollution is to raise gas taxes". It's also somewhat contradicted by the passage. In the scenario where we tax gas prices and people are paying $7 / gallon at the pump, they don't necessarily know that the price has been raised to combat the polluting effects of gas usage. They might just think the higher price is due to greed from their gas station, or from oil producing countries, or from their government. Regardless of how they interpret the higher price, it will still affect their consumer behavior. This answer is saying the only way it affects their behavior is if they mull over the cost of gas-related pollution.

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