Logical ReasoningDifficulty: Easy

PT129 S1 Q20 Explanation

Industrial engineer: Some people have suggested

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

TopicsMain Conclusion

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Stimulus

Industrial engineer: Some people have suggested that the problem of global warming should be addressed by pumping some of the carbon dioxide produced by the burning of fossil fuels into the deep ocean. Many environmentalists worry that this strategy would simply exchange one form of pollution for an equally destructive form. This anyway, where it does not cause environmental disturbances as destructive as global warming.

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
20.

Which one of the following most accurately expresses the conclusion of the industrial engineer's argument

Answer choices

  1. Unmentioned4% picked this

    Global warming from the emission of carbon dioxide into the atmosphere could be reduced by pumping some of that carbon

    This was never even said, so it can’t be the Main Conclusion. This is similar to the background claim in the first sentence.

  2. Counterpoint2% picked this

    Environmentalists worry that the strategy of pumping carbon dioxide into the deep ocean to reduce global warming would simply exchange one form of

    This is the claim that our Main Conclusion is fighting.

  3. Correct79% picked this

    Worrying that pumping carbon dioxide into the deep ocean to reduce global warming would simply exchange one form of pollution for another,

    Why this is right

    Pretty friendly answer in that it actually uses the wording “worry is unfounded” and just inserts the borrowed wording of the previous sentence.

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

  4. Premise8% picked this

    Much of the carbon dioxide now released into the atmosphere ends up in the ocean where it does not cause environmental disturbances

    This is the author’s premise.

  5. Unmentioned / What Else7% picked this

    To reduce global warming, the strategy of pumping into the deep ocean at least some of the carbon dioxide now released into

    This is the trap of thinking, “What might the author say next?” We’re just supposed to be identifying the explicit conclusion on the page. Maybe if you think “worrying about X is unfounded”, then your next thought would be, “so we should do X”, but maybe not. Either way, we’re not being tested on what else the author might believe. Make sure your correct answer traces back to a specific claim that was made in the argument.

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