Logical ReasoningDifficulty: Hard

PT158 S4 Q21 ExplanationDeveloper: The builders of the

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

TopicsStrengthen

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Stimulus

Developer: The builders of the Glen Veil apartment complex will not complete the complex unless a road connecting it to the town of Sierra is built. The completed apartment complex would strengthen Sierra's economy, and a stronger economy would benefit every Sierra resident. Therefore, the residents local tax to fund construction of the proposed road.

What this question is testing

Strengthen

Conclusion

Vote to raise your own taxes so I can build apartments. That is essentially the developer's pitch.

Evidence

The logical chain: your taxes pay for a road, I build apartments on that road, apartments boost the economy, economy boosting benefits you. Therefore... hand over your money?

Evaluate

It is actually a persuasive pitch, but there is a gap big enough to drive an apartment complex through. Just because something benefits you does not automatically mean you should vote to pay for it. Sunshine benefits everyone -- should we vote to fund the sun? We need a principle that bridges "you will benefit" to "you should vote yes."

Goal

Find the general rule that, once accepted, transforms the developer's "this helps you" into an airtight "so you should pay for it." That missing bridge is the whole question.

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

The question
21.

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

Answer choices, explained

  1. Bad Trigger Match21% picked this

    If a construction project is necessary in order to strengthen a town's economy, then the residents of that town should vote in favor of

    This principle requires the project to be "necessary" for economic growth. The developer only claims the apartment complex would strengthen the economy, not that it is the only way to do so. The mismatch is between sufficiency and necessity. The developer argues the project is sufficient to produce benefits, but this principle demands that it be necessary -- indispensable. Since other projects could also strengthen the economy, the developer cannot meet this principle's trigger condition. A principle requiring only that a project would benefit residents, rather than that it is indispensable, would be a better fit.

  2. Opposite Logic12% picked this

    The residents of a town should not vote in favor of a local tax to fund a construction project unless that construction project will

    This principle states that residents should not vote for a tax increase unless the resulting benefits accrue to all residents. While the developer does claim the economy strengthening would benefit every resident, this principle is structured as a negative condition -- a reason to vote no if the condition is not met, rather than a positive reason to vote yes when it is. More importantly, this principle could easily be weaponized against the developer: any resident who argues they would not personally benefit could use this principle to justify opposition. The developer needs a principle that positively connects benefit to voting obligation, not one that sets a high bar that could defeat the proposal.

  3. Wrong Gap12% picked this

    Whenever a town funds a construction project, it should do so by means of a

    This principle addresses whether projects should be funded by taxes versus debt -- the method of financing. The developer's logical gap is not about which funding mechanism is best but about why residents should support this particular expenditure at all. A principle about taxation being preferable to borrowing does not bridge the gap between "you would benefit" and "you should vote for the tax." Even if taxes are the ideal funding method, this says nothing about why residents should approve this specific tax for this specific project. The principle operates in the wrong analytical domain entirely.

  4. Undermines the Argument2% picked this

    Only those residents who will benefit from the results of a construction project should be required to pay a

    This principle states that only those who benefit from a project should be required to pay for it. At first glance, this seems supportive -- the developer claims residents benefit, so they should pay. But the principle creates a dangerous counter-argument. The developer wants all residents to vote yes. This principle implies that residents who do NOT benefit should NOT pay the tax. Any resident could argue "I will not personally benefit from apartments I will not live in," and this principle would support their opposition. Rather than unifying residents behind the tax, it fragments them into beneficiaries who should pay and non-beneficiaries who should not -- undermining the developer's blanket appeal.

  5. Correct53% picked this

    Anyone who would benefit from the results of a construction project should vote in favor of a local

    Why this is right

    This principle precisely fills the gap in the developer's argument. The developer establishes that residents would benefit from the project. This principle states that anyone who would benefit from a project should vote for the tax that funds it. Applied together: (1) the road enables an apartment complex that strengthens the economy (premise), (2) a stronger economy benefits every resident (premise), (3) anyone who benefits should vote for the funding tax (this principle), (4) therefore, residents should vote for the tax increase (conclusion). Without this principle, there is no logical reason why benefiting from something obligates you to support its funding. This principle provides that normative bridge, making the conclusion follow necessarily from the premises.

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

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