Logical ReasoningDifficulty: Hard

PT111 S3 Q20 Explanation

Scientist: Some critics of public

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

TopicsMust be True

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Stimulus

Scientist: Some critics of public funding for this research project have maintained that only if it can be indicated how the public will benefit from the project is continued public funding for it justified. If the critics were right about this, then support for the project that even its critics acknowledge.

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
20.

If the scientist’s claims are true, which one of the following must

Answer choices

  1. Too Strong: irrelevant6% picked this

    The benefits derived from the research project are irrelevant to whether or not its

    When we infer that the critics in the 1st sentence are wrong about what they say, we learn that “funding can be justified, even if we can’t indicate how the funding results in public benefit”. That means that “demonstrating how the public benefits” isn’t necessary. But this answer is saying that it isn’t relevant. That’s much stronger. It’s true to say that a 170+ LSAT score isn’t necessary to get into Harvard. It’s not true to say that a 170+ LSAT score isn’t relevant to getting into Harvard. p.s. Inference questions love to put a wicked trap answer in (A)’s slot. If we have a prediction in our heads, then (A) will try to sound like what we were looking for, but will be broken for some reason. Meanwhile, the correct answer is hiding out in (E) or (D).

  2. Unsupported: Justified8% picked this

    Continued public funding for the research project

    We don’t have any way to prove that funding is or isn’t justified. The conditional provided by "some critics" would be a way to prove that funding isn't justified, but we can't treat their view as fact. In fact that stimulus is actually telling us their view is wrong. But, again, even if we could treat the view of "Some critics" as fact, that rule still only allows one to prove when funding isn't justified. All we have the knowledge to do is say that the critics were wrong to think that justifying funding depends on indicating how it benefits the public. We have the power to say, “That’s not how we determine whether funding is justified.”

  3. Too Strong: surest indication11% picked this

    Public support for the research project is the surest indication of whether or not

    We don’t have any language that tells us which way of justifying funding is the #1 most sure.

  4. Unsupported Causal Relationship: because15% picked this

    There is tremendous public support for the research project because it can be indicated how the public will

    We didn’t read anything causal, so we have no way to derive that public support was caused by the public seeing how they would benefit from the public.

  5. Correct60% picked this

    That a public benefit can be indicated is not a requirement for the justification of the research

    Why this is right

    The 2nd sentence told us that the critics are wrong about what they said in the 1st sentence. This answer is just saying “the thing they said in the 1st sentence is wrong”. The first sentence said that “indicating how the public benefits” is required in order for continued funding to be justified. Since the 2nd sentence told us that the critics were wrong to say this, we can say that “indicating how the public benefits” is not required in order for continued funding to be justified.

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

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