It is unlikely that the world

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

TopicsRole

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Stimulus

It is unlikely that the world will ever be free of disease. Most diseases are caused by very prolific microorganisms whose response to the pressures medicines exert on them is predictable: they quickly evolve immunities power to infect and even kill humans.

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

19.

Which one of the following most accurately describes the role played in the argument by the claim that it is unlikely that the world will

Answer choices

Bad Premise Match4% picked this
It is a conclusion that is claimed to follow from the premise that microorganisms are too numerous for
This starts off correct, but the premise wasn't saying that microorganisms are too numerous to ever be fully defeated. It was saying that microorganisms will keep evolving new forms that elude our medicine.
4%
Correct72% picked this
It is a conclusion for which a description of the responses of microorganisms to the medicines designed to cure the diseases they
Why this is right
This correctly calls the first claim the conclusion and the description of the evidence is on point. The last two claims discuss the response that microorganisms have when we try to eliminate them with medicine.
Skill tested: Role · how this choice captures the argument's function is the move to repeat next time.
72%
Wrong Role3% picked this
It is a premise offered in support of the claim that most disease-causing microorganisms are able to evolve immunities to medicines while
It's not a premise. It's the main conclusion. The 2nd and 3rd claim combine to support it.
3%
Wrong Role1% picked this
It is a generalization used to predict the response of microorganisms to the medicines humans
Our claim was the main conclusion. A main conclusion isn't used to do anything. Everything else in an argument is used to arrive at the main conclusion.
1%
Bad Premise Match21% picked this
It is a conclusion that is claimed to follow from the premise that most microorganisms are immune to
This starts off correct, but the premise wasn't saying that most microorganisms are immune to medicine. It was saying that microorganisms will keep evolving new forms that elude our medicine.
21%

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