Logical ReasoningDifficulty: Easy

PT109 S3 Q22 Explanation

If relativity theory is correct,

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

TopicsParallel

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Stimulus

If relativity theory is correct, no object can travel forward in time at a speed greater than the speed of light. Yet quantum mechanics predicts that the tachyon, a hypothetical subatomic particle, travels faster than light. Thus, if relativity theory is is erroneous or tachyons travel backward in time.

What this question is testing

Parallel

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
22.

The pattern of reasoning is which one of the following arguments is most similar to that in

Answer choices

  1. Trap1% picked this

    According to a magazine article, the view that present-day English is a descendant of the ancient Proto-Indo-European language is incorrect. Rather, English more likely

  2. Trap4% picked this

    If the defendant committed the crime, then either the defendant had a motive or the defendant is irrational, for only irrational persons act with

  3. Correct93% picked this

    The human brain can survive without oxygen only for a few minutes, according to modern medicine. Surprisingly, a reliable witness reported that a shaman

    Why this is right

    Answer C is correct.

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

  4. Trap0% picked this

    Alexander the Great was buried either in Alexandria or in Siwa, Egypt. However, the burial place is more likely to be Siwa. A limestone

  5. Trap2% picked this

    If the big bang theory is correct, the universe is currently expanding: the galaxies are moving away from each other and from the center

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