Logical ReasoningDifficulty: Easy

PT116 S2 Q2 Explanation

Essayist: Earth is a living

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

TopicsRole

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

Essayist: Earth is a living organism, composed of other organisms much as animals are composed of cells, not merely a thing upon which creatures live. This hypothesis is supported by the fact that, like all organisms, Earth can be said to have a metabolism and to regulate its temperature, humidity, and other but neither do insects (they have no lungs), though they respire successfully.

What this question is testing

Role

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
2.

The assertion that insects do not literally breathe plays which one of the following roles in

Answer choices

  1. Correct88% picked this

    a reason for not rejecting Earth’s status as an organism on the basis of

    Why this is right

    This gets at the "Shooting down an Anticipated Objection" vibe we were looking for. An opponent of the author might say, "Earth does not deserve the status of being considered a living organism. After all, it doesn't breathe." The author can say, "Just because something doesn't breathe doesn't prove that it isn't a living organism. After all, insects don't breathe (and they are clearly living organisms)."

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

  2. Opposite3% picked this

    a reason for rejecting as false the belief that Earth is

    The author's conclusion is that "Earth is a living organism". If we rejected as false the belief that "Earth is a living organism", we would be rejecting the author's conclusion as false. And this answer is saying that "the claim that insects can't breathe was meant to help reject the author's conclusion". We can tell that wasn't the role, since the author is the one volunteering the idea that insects can't breathe. Why would she volunteer a reason to reject her conclusion as false? We can also just evaluate the internal logic of this answer. If someone is rejecting as false the belief that Earth is a living organism, that person is arguing: Earth is not a living organism. Why should we believe them? Could they say, "One reason you should believe that Earth is not a living organism is that insects do not breathe." No, that sounds nonsensical.

  3. Unrelated to Metabolism3% picked this

    an illustration of the general claim that to be an organism, a creature must

    The final sentence about breathing has nothing to do with illustrating the claim that all organisms have metabolisms. It has to do with an incorrect assumption some people might have that "all organisms can breathe".

  4. Opposite3% picked this

    an example of a type of organism whose status, like Earth’s,

    The author is bringing up insects as an example of an organism whose status is clear. We all know that insects are living organisms, so the fact that insects can't breathe shows us that you don't need to be able to breathe to qualify as a living organism.

  5. Wrong Role3% picked this

    an illustration of a type of organism out of which Earth

    When the author says "insects can't breathe", she is involved in shooting down the objection that "Earth can't be considered a living organism, since Earth can't breathe." She is not trying to illustrate the types of organisms that comprise Earth.

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