Logical ReasoningDifficulty: Hard

PT126 S3 Q21 Explanation

Any student who is not

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

TopicsSufficient Assumption

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Stimulus

Any student who is not required to hand in written homework based on the reading assignments in a course will not complete all of the reading assignments. Even highly motivated students will neglect their reading assignments if they are not required to hand in written homework. Therefore, if the students in a student in that course will receive a high grade for the course.

What this question is testing

Sufficient Assumption

Your task

Find the assumption that, if added, guarantees the conclusion follows.

Common trap

Answers that only partly bridge the gap, leaving the conclusion unproven.

Winning move

Identify the new term in the conclusion and pick the choice that links it to the evidence.

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

The question
21.

The conclusion of the argument follows logically if which one of the

Answer choices

  1. Correct69% picked this

    No student who completes anything less than all of the reading assignments for a course will earn a

    Why this is right

    This bridges the gap between ~RH → ~HG not completing all of the reading assignment and not getting a high grade in the course.

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

  2. Negated Assumption13% picked this

    Any student who completes all of the reading and written assignments for a course will earn a high

    This answer negates the RH → HG assumption of the argument.

  3. Too Weak / Negated Assumption3% picked this

    All highly motivated students who complete all of the reading assignments for a course will receive high

    This answer is too weak in HM + RH → HG that it only pertains to highly motivated students while the conclusion is about all students. Furthermore, this simply negates the argument’s assumption in this weaker form.

  4. Too Weak / Negated Premise6% picked this

    If highly motivated students are required to hand in written homework on their reading assignments, then they will complete

    This answer is too weak in HM + WH → RH that it only pertains to highly motivated students while the conclusion is about all students. Furthermore, this simply negates the argument’s premise in this weaker form.

  5. Too Weak / Negated Conclusion9% picked this

    Some highly motivated students will earn high grades in a course if they are required to hand in written

    This answer is too weak in HM + WH → HG that it only pertains to some highly motivated students while the conclusion is about all students. Furthermore, this simply negates the argument’s conclusion in this weaker form.

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