Logical ReasoningDifficulty: Easy

PT110 S3 Q2 Explanation

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

TopicsParadox

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Stimulus

To acquire a better understanding of the structure and development of the human personality, some psychologists of animals.

What this question is testing

Paradox

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
2.

Each of the following, if true, contributes to an explanation of the practice

Answer choices

  1. Explains3% picked this

    The actions of humans and animals are believed to be motivated by similar instincts, but these instincts are

    Since actions are motivated by similar instincts (whether human or animal), there is some transferability. And since these are easier to discern in animals, it makes sense to use animals as research subjects.

  2. Explains3% picked this

    The law forbids certain experiments on humans but permits them

    This gives a reason why they would work with animals, rather than humans --- they're not allowed to work on humans.

  3. Explains3% picked this

    It is generally less expensive to perform experiments on animals than it is to perform

    This gives a reason why they would work with animals, rather than humans --- experiments on animals are cheaper.

  4. Correct89% picked this

    Proper understanding of human personality is thought to provide a model for better understanding the

    Why this is right

    This reverses the relationship given in the prompt. In the prompt, we were studying the personalities of animals in order to better understand human personalities. This is saying that studying the personality of humans provides a way to better understand the personality of animals. Is it common sense to say "if studying X helps you to understand Y, then studying Y will help you to understand X?" Not really. Studying math will help you to understand quantum physics, but studying quantum physics will not help you understand math. Studying the music of the Beatles will help you understand the music of Nirvana, but studying Nirvana won't help you understand the Beatles. Note that on EXCEPT questions, the correct answer (the one that is actually not helpful) often finds a way to parrot some of the keywords in the prompt so that it seems relevant or useful.

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

  5. Explains2% picked this

    Field observations of the behavior of young animals often inspire insightful hypotheses about

    This gives a connection between studying animals and attaining a better understanding of humans. First, come the observations of animals, then come the insightful hypotheses about human personality.

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