Logical ReasoningDifficulty: Hard

PT134 S3 Q26 Explanation

Acquiring complete detailed information

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

TopicsSufficient Assumption

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Stimulus

Acquiring complete detailed information about all the pros and cons of a product one might purchase would clearly be difficult and expensive. It is rational not to acquire such information unless one expects that the benefits of doing so will outweigh the cost and difficulty bother to acquire such information are thereby behaving rationally.

What this question is testing

Sufficient Assumption

Your task

Find the assumption that, if added, guarantees the conclusion follows.

Common trap

Answers that only partly bridge the gap, leaving the conclusion unproven.

Winning move

Identify the new term in the conclusion and pick the choice that links it to the evidence.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
26.

The conclusion of the argument is properly drawn if which one of the

Answer choices

  1. Reversal11% picked this

    Rational consumers who do not expect that the benefits outweigh the cost and difficulty of acquiring detailed information about a product they might purchase

    This reverses the R + ~BOC ? ~ACDI assumption of the argument.

  2. Negation7% picked this

    Whenever it is rational not to acquire detailed information about a product, it would be irrational to bother

    This negates the ACDI ? ~R argument’s conclusion.

  3. Too Weak14% picked this

    The benefits of acquiring detailed information about a product one might purchase usually do not outweigh the cost

    While this indicates that the benefits to a consumer of acquiring detailed information about a product one might purchase do not typically outweigh the costs of acquiring such information, it does not establish what the consumer expects about the benefits of acquiring such information.

  4. Negation12% picked this

    Rational consumers usually expect that the benefits of acquiring detailed information about a product they might purchase would not outweigh the cost

    This negates the second R ? ~BOC premise in the argument.

  5. Correct56% picked this

    Consumers who do not bother to acquire complete detailed information about a product they might purchase do not expect that the benefits of acquiring

    Why this is right

    This bridges the gap ~ACDI ? ~BOC between the second premise and the conclusion.

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

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