Logical ReasoningDifficulty: Medium

PT118 S3 Q15 Explanation

Psychologist: Doctors should never prescribe

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

TopicsFlaw

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Stimulus

Psychologist: Doctors should never prescribe sedatives for people with insomnia. Most cases of insomnia that psychologists treat are known to be caused by psychological stress. This suggests that insomniacs do not need drugs that alter their help them alleviate the stress causing their insomnia.

What this question is testing

Flaw

Your task

Describe the reasoning error the argument actually commits.

Common trap

Answers that name a real logical flaw the argument doesn't actually make.

Winning move

Articulate the gap in the reasoning yourself, then match it to the choice that describes that 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
15.

Each of the following describes a flaw in the psychologist’s

Answer choices

  1. Correct75% picked this

    It presumes, without providing warrant, that insomnia contributes to an inability to

    Why this is right

    Answer A is correct.

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

  2. Trap11% picked this

    It fails to consider the possibility that sedatives are the only treatment known to be effective for cases of

  3. Trap3% picked this

    It neglects the possibility that for some people psychotherapy is a completely ineffective

  4. Trap3% picked this

    It overlooks the possibility that sedatives could help insomniacs cope

  5. Trap7% picked this

    It presumes, without providing justification, that the cases of insomnia psychologists treat are representative of

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