Logical ReasoningDifficulty: Hard

PT7 S1 Q24 Explanation

Many major scientific discoveries of

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

TopicsNecessary Assumption

Keep going in LSAT Lab

  • Save & drill this skill build targeted practice sets from questions like this one

  • Video walkthroughs watch every question solved step by step

  • 81 official LSATs as questions, timed sections & full-length tests

Full official LSAT questions are available through LawHub. This page provides LSAT Lab's explanation, strategy, and review tools without republishing the full official question.

Stimulus

Many major scientific discoveries of the past were the product of serendipity, the chance discovery of valuable findings that investigators had not purposely sought. Now, however, scientific research tends to be so costly that investigators are heavily dependent on large grants to fund their research. Because such grants require investigators to provide under the prevailing circumstances, serendipity can no longer play a role in scientific discovery.

What this question is testing

Necessary Assumption

Your task

Find the assumption the argument requires in order for its conclusion to hold.

Common trap

Answers that would help the argument but aren't strictly required (sufficient, not necessary).

Winning move

Negate each choice — the right one breaks the argument when negated.

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

The question
24.

Which one of the following is an assumption on which the

Answer choices

  1. Correct70% picked this

    Only findings that an investigator purposely seeks can directly bear on

    Why this is right

    Since this is conditional, our default response is to just look at the reasoning move and ask whether our author did such a thing. This is saying, "If a finding directly bears on the research, then it is a finding the investigator purposely seeks". The argument established that based on how grants work, investigators will only be looking at stuff that directly bears on their research (they'll ignore anything else). Because they're only looking at stuff that directly bears, the author thinks they won't make serendipitous discoveries (which were defined as findings that are not purposely sought). So, yes, this does match the reasoning move from, "If they only look at what directly bears, then there will be no serendipitous discovery", because it's saying "the stuff that directly bears will be stuff the investigator purposely sought (not accidental stuff discovered along the way)". Negating conditional ideas is not a great tactic for most students, but if we did, we'd be saying "Hey, sometimes findings that weren't purposely sought can still directly bear on the research", which opens up the door to the idea that serendipity could still happen even if you're restricted to only looking at stuff that directly bears on the research.

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

  2. Out of Scope: the past11% picked this

    In the past few scientific investigators attempted to make clear predictions of the outcome

    This argument is only what's possible under present circumstances. What happened in the past is irrelevant.

  3. Out of Scope: personally prefer9% picked this

    Dependence on large grants is preventing investigators from conducting the type of scientific research that those

    (C) touches on investigators' personal preferences, but this argument doesn't address whether research is aligned with personal preferences. It's only about whether research would have the freedom to pursue serendipitous discoveries made along the way.

  4. Too Strong: All8% picked this

    All scientific investigators who provide grant sponsors with clear projections of the outcome of their research receive at least some of the

    The argument doesn't care if 100% vs. 99% vs. 20% of clearly stated grant proposals get funding. This is a very extreme idea, and there's no reason the author needs to believe that every single scientist with a good grant proposal gets at least some money.

  5. Too Strong: the most valuable2% picked this

    In general the most valuable scientific discoveries are the product

    Nothing in the argument is using comparative language to rank the value of discoveries.

Continue the review in LSAT Lab

Save this question, watch the video walkthrough, and drill similar questions in your LSAT Lab account.

LSAT Lab

Turn this review into a targeted study plan.

Save this question, drill more like it, watch the video walkthrough, and track your progress in your LSAT Lab account.

Start practicing free