Logical ReasoningDifficulty: Medium

PT23 S3 Q11 Explanation

Editorial: The most vocal proponents

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

TopicsNecessary Assumption

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Stimulus

Editorial: The most vocal proponents of the proposed law are not permanent residents of this island but rather a few of the wealthiest summer residents, who leave when the vacation months have passed. These people will benefit from passage of this law while not having to deal with the problems associated with outsiders at the cost of creating problems for the island’s permanent residents.

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
11.

Which one of the following is an assumption on which the

Answer choices

  1. Irrelevant Comparison2% picked this

    The average income of the island’s summer residents is greater than the average income of

    This answer choice addresses income differences between summer and permanent residents, but the argument’s focus is on the distribution of benefits and costs rather than on the relative income levels between the two groups.

  2. Correct73% picked this

    The problems associated with this law outweigh any benefits it might provide the

    Why this is right

    This answer choice is necessary because it establishes the assumption that even if the law confers some benefits on permanent residents, those benefits are outweighed by the problems it causes them. Without this assumption, one could argue that local residents might still gain overall, undermining the conclusion that support for the law solely serves outsider interests.

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

  3. Too Strong (most)10% picked this

    Most of the island’s summer residents would benefit from passage of

    The word 'most' is almost always wrong on Necessary Assumption, because does it really make a crucial difference to this argument whether 51% of summer residents benefit from the law, as opposed to 49%? No, that distinction would only matter if the author were claiming something about "most summer residents". In actuality, the author seems to be saying that the law will benefit "a few" outsiders".

  4. Too Strong (most)2% picked this

    Most of the island’s summer residents support passage of

    The word 'most' is almost always wrong on Necessary Assumption, because does it really make a crucial difference to this argument whether 51% of summer residents support the law, as opposed to 49%? No, that distinction would only matter if the author were claiming something about "most summer residents". In actuality, the author seems to be saying that the law will benefit "a few" outsiders". Saying "the most vocal proponents are outsiders" is not the same as saying "most outsiders are vocal proponents".

  5. Too Strong13% picked this

    Most of the island’s permanent residents oppose passage of

    Once again, the word "most" is an irrelevant piece of specificity. The argument doesn't care whether 51% of locals vs. 49% of them oppose the passage. The author is making a claim about whether the locals would benefit, not about whether they oppose it.

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