Logical ReasoningDifficulty: Hard

PT21 S2 Q24 Explanation

The rejection by the meteorologist

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

TopicsMethod

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Stimulus

Statistician: Changes in the Sun’s luminosity correlate exceedingly well with average land temperatures on Earth. Clearly—and contrary to accepted opinion among meteorologists—the land temperatures on Earth.

Meteorologist: I disagree. Any professional meteorologist will tell you that in a system as complicated as that giving rise to the climate, no significant by a single variable.

What this question is testing

Method

Your task

Describe how the argument proceeds — the technique it uses to reach its conclusion.

Common trap

Answers that describe a method the argument doesn't actually use.

Winning move

Track the role each statement plays, then match that to the choice describing the same moves.

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

The question
24.

The rejection by the meteorologist of the statistician’s conclusion employs which one of the following

Answer choices

  1. Correct52% picked this

    supporting a conclusion about a specific case by invoking a

    Why this is right

    The generalization invoked is this: In a complicated system, no significant aspect can be controlled by just one factor. Her conclusion is about the specific case of whether the Sun could be the sole cause of land temperatures on Earth. She says "no it couldn't", because climate is a complicated system, land temperatures are a significant factor in climate, and so they cannot be controlled by just one factor, such as the Sun.

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

  2. Out of Scope: counterexample13% picked this

    producing a single counterexample that establishes that a generalization is false

    The generalization being argued with is that "the Sun's luminosity essentially controls land temperatures on Earth". If we were trying to prove that false with a single counterexample (we couldn't, since the 'essentially' tolerates exceptions), we would want one of these situations: - the Sun's luminosity changed a bunch, but land temperatures didn't or - land temperatures changed a bunch, but the Sun's luminosity hadn't This author doesn't provide either of those.

  3. Opposite: single cause21% picked this

    reanalyzing a correlation as reflecting the multiple effects of a

    The first author presented the correlation between Sun's luminosity and land temps on Earth. He concluded the Sun essentially controls land temps. Our author is reanalyzing that correlation, and specifically saying that in a complicated system, changes to significant factors are not from a single cause.

  4. Out of Scope: can't be tested6% picked this

    rejecting a conclusion because it is a proposition that cannot be

    We're talking about relationships between the Sun's luminosity and land temperatures on Earth, both of which seem like things that could certainly be measured and experimentally tested.

  5. Out of Scope: unfavorable evidence8% picked this

    pointing out that potentially unfavorable evidence has been

    This author doesn't present counterevidence that's been systematically neglected. She cites a generalization that's incompatible with what the first author has claimed. He may have failed to consider that principle, but he hasn't systematically neglected evidence.

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