Logical ReasoningDifficulty: Medium

PT149 S3 Q14 Explanation

Several Tyrannosaurus rex skeletons found

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

TopicsMost Supported

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Stimulus

Several Tyrannosaurus rex skeletons found in North America contain tooth marks that only a large carnivore could have made. At the time T. rex lived, it was the only large carnivore in North America. The tooth marks could have resulted only from combat or feeding. But to inflict on the skeleton of a live animal.

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 information above most strongly supports which one of

Answer choices

  1. No Support: smaller carnivores1% picked this

    T. rex regularly engaged in combat with

    We have no support that T. rex ever engaged in combat with anyone, let alone smaller carnivores.

  2. Too Strong: common9% picked this

    At the time T. rex lived, it was common for carnivores to feed

    We only have support here that some T. rex's had their dead body eaten by other T. rex's. We don't know if this was common among T. rex's, let alone common among carnivores in general.

  3. Correct79% picked this

    T. rex sometimes engaged in

    Why this is right

    We have support here that some T. rex's had their dead body eaten by other T. rex's. Since "cannibalism" just means eating something the same species as you, then, yes, we can strongly support the idea that there were at least some instances of T. rex's eating other T. rex's.

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

  4. No Support: intraspecies combat9% picked this

    T. rex sometimes engaged in intraspecies

    We have no support that T. rex ever engaged in combat with anyone. We know the teeth marks found on some T. rex skeletons had to come from fighting another T. rex or having their dead body eaten by another T. rex. But the final sentence heavily tips the scales towards that latter option, since it says that it would have been almost impossible for the first option to have occurred.

  5. Out of Scope2% picked this

    At the time T. rex lived, there were large carnivores on continents other

    Out of Scope: other than North America We didn't get any information about continents other than North America.

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