Logical ReasoningDifficulty: Easy

PT103 S2 Q6 Explanation

The largest volcano on Mars rises

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

TopicsMust be True

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Stimulus

The largest volcano on Mars rises 27 kilometers above the surrounding plain and covers an area roughly the size of Romania. Even if the Earth’s gravity were as low as the gravity of Mars is, no volcano of such size could exist on Earth, for the Earth’s crust, although of essentially the that mass and would buckle under it, causing the mountain to sink.

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
6.

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

Answer choices

  1. Trap2% picked this

    The surface of Mars is less subject to forces of erosion than is the surface

  2. Trap2% picked this

    The highest volcanoes on Mars occur where its crust

  3. Trap3% picked this

    On average, volcanoes on Mars are higher than those

  4. Correct88% picked this

    The crust of Mars, at least at certain points on the planet, is thicker than the

    Why this is right

    Answer D is correct.

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

  5. Trap5% picked this

    At least some of the Earth’s volcanoes would be larger than they actually are if the Earth’s crust

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