Logical ReasoningDifficulty: Easy

PT142 S4 Q3 Explanation

The master plan for the

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

TopicsStrengthen

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Stimulus

The master plan for the new park calls for the planting of trees of any species native to this area, except for those native trees that grow to be very large, such as the cottonwood. The trees that the community group donated were purchased at Three Rivers Nursery, the donated trees are probably consistent with the master plan.

What this question is testing

Strengthen

Your task

Find the choice that makes the argument's conclusion more likely to be true.

Common trap

Answers that are consistent with the argument but add no real support, or that strengthen a claim the argument doesn't make.

Winning move

Locate the gap between evidence and conclusion, then pick the choice that closes it.

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

The question
3.

Which one of the following, if true, most strengthens

Answer choices

  1. No Impact1% picked this

    Some tree species that grow to be very large are consistent with

    The fact that this is so weakly worded (some) is an instant turn-off. It also seems to just contradict what he heard about the master plan, which was that we were going to "plant trees of any species native to this area, except for those that grow to be very large". So if anything it feels more like it's clashing with the paragraph than supporting it.

  2. Weakens, if anything1% picked this

    Three Rivers Nursery sells cottonwood

    Cottonwood was an example of a tree that wouldn't be consistent with the master plan, because it grows very large. If Three Rivers sells cottonwood and Three Rivers donated us some of their trees, then it's possible they donated us some cottonwood. In that case, the donated trees would not be consistent with the master plan.

  3. No Impact1% picked this

    Many of the native species that Three Rivers Nursery sells are

    We know that Three Rivers donated trees, not shrubs. So frankly, we don't care at all about what shrub inventory Three Rivers has.

  4. No Impact1% picked this

    Tree species that are not native to this area and that are consistent with the master plan are

    By definition, non-native trees that are consistent with the master plan should be hard (if not impossible) to find. That's just an inference we can draw from being told that the master plan calls for "trees of any species native to this area". Any tree species not-native to this area is by definition not consistent with the master plan. Since "we already knew this answer" (we could have derived it from what we were already told), this answer isn't providing us with any new information. Most importantly, it has nothing to do with convincing us that the donated trees from Three Rivers are native and don't grow to be very large.

  5. Correct96% picked this

    Three Rivers Nursery does not sell any tree species that grow to

    Why this is right

    This rules out one of our two possible objections. To be consistent with the master plan, we need to know that the donated trees are: 1. native to this area 2. don't grow to be very large Since Three Rivers mostly sells native trees the author can feel good about #1 (not certain). She can say "the donated trees are probably native". But we have no idea if they conform to the master plan in regards to the "except for those that grow to be very large" provision. This answer reassures us that they do! The donated trees couldn't possibly illegal ones that grow to be very large because Three Rivers doesn't sell any trees that grow to be very large.

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

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