Logical ReasoningDifficulty: Hard

PT118 S1 Q8 Explanation

Trust, which cannot be sustained

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

TopicsMust be True

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Stimulus

Trust, which cannot be sustained in the absence of mutual respect, is essential to any long-lasting relationship, personal or professional. However, personal relationships, such as marriage or friendship, additionally require natural affinity. If a personal relationship is to twin pillars of mutual respect and affinity.

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
8.

If the statements above are true, then which one of the following must

Answer choices

  1. Correct65% picked this

    A friendship supported solely by trust and mutual respect will not

    Why this is right

    If something is supported solely by mutual respect and and trust, then it isn't supported by everything else in the world (including affinity). Thus, according to the last sentence, this friendship (a personal relationship) cannot endure (will not be long-lasting).

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

  2. Reversed Logic15% picked this

    In the context of any professional relationship, mutual respect

    We were told that trust ? mutual respect (trust requires / presupposes mutual respect) This answer is selling us on the reversal, mutual respect ? trust

  3. Reversal17% picked this

    If a personal relationship is supported by mutual respect and affinity, it will last

    This is reversed logic on the final sentence. We know that long term relationships require mutual respect and affinity, personal mutual respect relationship ? and endures affinity And this answer choice is giving us that conditional in illegal backwards form.

  4. Unknown Comparison: longer-lasting1% picked this

    Personal relationships, such as marriage or friendship, are longer-lasting than

    "long-lasting" was used only in an absolute, yes/no sense. We can't switch into talking about it in a Relative sense, and we have no way of comparing the longevity of personal vs. professional relationships.

  5. Reversal1% picked this

    Basing a marriage on a natural affinity will ensure that it

    This is again reversing something we're told in the last sentence. An enduring marriage would require affinity (and mutual respect). But this answer is acting like affinity by itself guarantees an enduring marriage.

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