Logical ReasoningDifficulty: Medium

PT137 S3 Q15 Explanation

Technologically, it is already possible

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

TopicsMain Conclusion

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Stimulus

Technologically, it is already possible to produce nonpolluting cars that burn hydrogen rather than gasoline. But the national system of fuel stations that would be needed to provide the hydrogen fuel for such cars does not yet exist. However, this infrastructure is likely to appear and grow rapidly. A vehicles, yet it quickly developed in response to consumer demand.

What this question is testing

Main Conclusion

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
15.

Which one of the following most accurately expresses the conclusion drawn in

Answer choices

  1. Premise4% picked this

    It is already technologically possible to produce nonpolluting cars that burn hydrogen

    This is a fact, and it isn't supported by anything. A Conclusion is an opinion and at least one supporting idea is offered for it.

  2. Counterpoint2% picked this

    The fuel-distribution infrastructure for hydrogen-powered cars still needs to

    Yup, doesn't exist yet. This is a fact and it isn't supported. Our conclusion is the opinion that "the infrastructure will come soon" and it's supported by the fact that "when gas cars debuted, we built an infrastructure for them pretty quickly".

  3. Too Broad11% picked this

    If a new kind of technology is developed, the infrastructure needed to support that technology is likely to quickly develop

    This is fishing for people who like the sound of an underlying Principle or Necessary Assumption. We're just trying to find a match for the claim that "the hydrogen fuel infrastructure will be created soon".

  4. Correct80% picked this

    The fuel-distribution infrastructure for hydrogen-powered cars is likely to appear and

    Why this is right

    This matches what we were looking for, an equivalent rephrasing of "However, this infrastructure is likely to appear and grow rapidly". If a conclusion has a pronoun in it (e.g. "this infrastructure" / "that claim" / "such things"), we should always prep our brains for how the answer is going to sound by replacing the pronoun with the specific thing it's referring to.

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

  5. Assumption2% picked this

    Hydrogen-powered vehicles will be similar to gasoline-powered vehicles with regard to the amount of consumer demand

    This was never stated, so it can't be the author's stated conclusion. This is just something the author is assuming.

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