Logical ReasoningDifficulty: Easy

PT131 S2 Q8 Explanation

Though ice cream

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

TopicsFlaw

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Stimulus

Though ice cream is an excellent source of calcium, dairy farmers report that during the past ten years there has been a sharp decline in ice cream sales. And during the same period, sales of cheddar cheese have nearly doubled. Therefore, more and more people calcium by eating cheddar cheese rather than ice cream.

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
8.

The reasoning above is most vulnerable to criticism on the grounds

Answer choices

  1. Opposite1% picked this

    fails to produce statistical evidence supporting the dairy

    The evidence is statistical evidence about sales declines and surges.

  2. Correct85% picked this

    fails to consider alternative explanations of the decline in sales of

    Why this is right

    The fundamental idea of the Causal Flaw is that the author is over-confidently arriving at one possible causal explanation when other possibilities surely exist. This answer just acknowledges that.

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

  3. Bad Premise Match1% picked this

    relies solely on the testimony of individuals who are likely to

    Is the evidence "testimony of individuals"? Not at all, it's sales statistics. This answer just describes the Famous Sampling Flaw, as though it's watching a different movie than the one we just watched.

  4. Out of Scope1% picked this

    presumes, without providing justification, that ice cream is a better source of calcium than

    Out of Scope: "better source of calcium" The author is never evaluating whether switching from ice cream to cheddar is a good or bad thing, so she's not assuming anything about the superiority of ice cream to cheddar cheese or vice versa. She's only making a descriptive causal argument, no judgment.

  5. Too Strong12% picked this

    presumes, without providing justification, that people who eat cheddar cheese never

    The author certainly hasn't committed herself to the assumption that anyone who eats cheddar cheese never eats ice cream.

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