Logical ReasoningDifficulty: Hard

PT125 S4 Q11 Explanation

Australia has considerably fewer

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

TopicsMain Conclusion

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Stimulus

Australia has considerably fewer species of carnivorous mammals than any other continent does but about as many carnivorous reptile species as other continents do. This is probably a consequence of the unusual sparseness of Australia's ecosystems. To survive, carnivorous mammals must eat much more than carnivorous reptiles disadvantage in ecosystems in which there is relatively little food.

What this question is testing

Main Conclusion

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
11.

Which one of the following most accurately expresses the main conclusion of

Answer choices

  1. Phenomenon6% picked this

    Australia has considerably fewer species of carnivorous mammals than any other continent does but about as many carnivorous reptile

    This is the phenomenon the the argument’s main conclusion seeks to explain.

  2. Intermediate Conclusion11% picked this

    In ecosystems in which there is relatively little food carnivorous mammals are at a disadvantage

    This point is supported by evidence and also supports the main conclusion.

  3. Correct68% picked this

    The unusual sparseness of Australia's ecosystems is probably the reason Australia has considerably fewer carnivorous mammal species than other continents do but

    Why this is right

    This best paraphrases the argument’s main point.

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

  4. Premise4% picked this

    The reason that carnivorous mammals are at a disadvantage in ecosystems in which there is relatively little food is that they must eat much

    This is a premise of the intermediate argument.

  5. Reversal12% picked this

    Because Australia's ecosystems are unusually sparse, carnivorous mammals there are at a disadvantage relative

    This reverses the relationship between the intermediate conclusion and the main conclusion.

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