Logical ReasoningDifficulty: Medium

PT132 S4 Q4 Explanation

Paleontologists recently excavated two

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

TopicsRole

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Stimulus

Paleontologists recently excavated two corresponding sets of dinosaur tracks, one left by a large grazing dinosaur and the other by a smaller predatory dinosaur. The two sets of tracks make abrupt turns repeatedly in tandem, suggesting that the predator was following the grazing dinosaur and had matched its stride. Modern predatory mammals, that the predatory dinosaur was chasing the grazing dinosaur and attacked immediately afterwards.

What this question is testing

Role

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
4.

Which one of the following most accurately describes the role played in the argument by the statement that the predatory dinosaur was following the grazing dinosaur

Answer choices

  1. Opposite: not evidence7% picked this

    It helps establish the scientific importance of the argument's overall conclusion, but is not offered as

    The claim that "the predator was following the grazing dino and matching its stride" is definitely evidence for the conclusion that "the predatory dino was chasing the grazing dino and attacked afterwards". We could also reject this answer since it doesn't establish any "scientific importance".

  2. Opposite: rejected2% picked this

    It is a hypothesis that is rejected in favor of the hypothesis stated in the

    Our author definitely isn't rejecting this idea; it's part of how she arrives at her conclusion!

  3. Correct81% picked this

    It provides the basis for an analogy used in support of the

    Why this is right

    This acknowledges, in a complicated way, that this claim was part of the author's support. Since the second to last sentence talks about modern predators (they match stride before striking) in order to then lead into a conclusion about extinct dino predators (this dino predator was matching stride before striking), we can say that the argument employs an analogy. The modern predator example is saying: match stride comes right before attack The claim they're asking us provides the basis that the dino predator was matching stride, so that we can use the analogy to get to the conclusion that the dino predator's footprints were right before they attacked the grazing dino.

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

  4. Out of Scope: possible objection2% picked this

    It is presented to counteract a possible objection to the argument's

    There aren't any hints of possible objections being discussed in this paragraph. It's just a linear, "here are these tracks, and this is our interpretation" type of argument.

  5. Wrong Role8% picked this

    It is the overall conclusion of

    The main conclusion is the final sentence. The claim we're being asked about "the predator was following the grazing dino and had matched its stride" combines with "modern predators match stride when chasing, right before they pounce" in order to support the final sentence: the predator was chasing, right before it pounced.

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