Logical ReasoningDifficulty: Easy

PT106 S1 Q14 Explanation

The axis of Earth’s daily rotation

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

TopicsMust be True

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Stimulus

The axis of Earth’s daily rotation is tilted with respect to the plane of its orbit at an angle of roughly 23 degrees. That angle can be kept fairly stable only by the gravitational influence of Earth’s large, nearby Moon. Without such a stable and moderate axis tilt, a planet’s climate is very small moons, tilts at wildly fluctuating angles, and cannot support life.

What this question is testing

Must be True

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
14.

If the statements above are true, which one of the following must also be true on the

Answer choices

  1. Trap4% picked this

    If Mars had a sufficiently large nearby moon, Mars would be able

  2. Correct86% picked this

    If Earth’s Moon were to leave Earth’s orbit, Earth’s climate would be unable

    Why this is right

    Answer B is correct.

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

  3. Trap6% picked this

    Any planet with a stable, moderate axis tilt can

  4. Trap4% picked this

    Gravitational influences other than moons have little or no effect on the magnitude of the tilt angle of

  5. Trap1% picked this

    No planet that has more than one moon can

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