Logical ReasoningDifficulty: Medium

PT154 S2 Q18 ExplanationAnthropologists have long debated whether

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

TopicsRole

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Stimulus

Anthropologists have long debated whether the customs of a culture invariably function to preserve it. According to one proposed definition, a culture is the totality of the customs practiced by those whose culture it is. If this definition is correct, then the customs of a culture necessarily function to preserve it, even any custom by a culture’s members would by definition constitute that culture’s destruction.

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
18.

Which one of the following most accurately describes the role played in the argument by the statement that under a certain conception of culture, the abandonment of any

Answer choices, explained

  1. Wrong Ingredient5% picked this

    It is the main conclusion drawn in

    The main conclusion is the first half of the last sentence, which we can tell because it's supported with the Support Indicator "because" (FABS = for, after all, since, because).

  2. Not a Technical Term2% picked this

    It is a definition of a technical term used in

    It is a definition, but is "culture" a technical term? It seems like a basic, familiar noun. Technical terms are like "glissando, depth of field, covariation"; they are terms that people outside a certain field would not necessarily know.

  3. Correct79% picked this

    It is a claim that is used to support a conditional conclusion drawn

    Why this is right

    Is the conclusion conditional? Sure, it says, If this definition ? customs preserve culture is correct at least in a technical sense Does the definition in the 2nd sentence used to support this conclusion? Yes, in the sense that the premise (the final claim) only makes sense when that definition is applied to it. If we weren't using that definition as our operative definition of "culture", then we wouldn't accept that "abandoning any custom would by definition destroy that culture".

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

  4. Bad Conclusion Match12% picked this

    It is a claim that is used to support the view that a culture should be understood as

    The author is not concluding or suggesting that we should understand culture as a totality of customs. Whenever an author says "If X is true, then Y", the author is not in any way hinting that she thinks X is true or should be true. Furthermore, in this case, the author is showing that if we used this definition of culture then we would get the absurd implication that any time a culture decides to drop or add a custom, that entire culture ceases to exist. (Who would think we should define culture in a way that would mean we're constantly losing and gaining cultures based on slight changes).

  5. Not Ascribed / Not Called Trivial2% picked this

    It is a claim ascribed by the argument to some anthropologists but dismissed by the

    The second sentence does not make clear who has proposed this definition. The fact that anthropologists are discussed in the first sentence doesn't mean that they proposed this definition. And the author isn't dismissing the definition as trivial. The author is saying, "If this definition were correct, then we could get this implication, which means that in some trivial way the idea that customs preserve culture would be true."

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