Logical ReasoningDifficulty: Easy

PT17 S2 Q1 Explanation

The basic ingredients from which

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

TopicsMust be True

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Stimulus

The basic ingredients from which cement is made are both cheap and plentiful. Materials as common as limestone and clay will do. Nevertheless, the price of cement is influenced by the price of oil, because turning high-temperature kilns uses large amounts of energy.

What this question is testing

Must be True

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
1.

Which one of the following can be logically inferred from

Answer choices

  1. Opposite (if anything)5% picked this

    Oil is one of the basic ingredients that make

    If anything, the stimulus implies that oil is not among the ingredients of cement.

  2. Correct90% picked this

    Oil is a source of energy for some of the kilns used in the

    Why this is right

    In order for the price of oil to influence the price of cement because of the energy used to run the kilns, it has to be true that at least some of the kilns use oil as a source of energy.

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

  3. Unsupported Relationship2% picked this

    The higher the price of cement rises, the higher the price

    Nothing here should lead us to infer a directly proportional relationship between the cost of cement and the cost one basic ingredient (clay).

  4. Unsupported Relationship1% picked this

    Whenever oil prices rise, cement prices

    Nothing here should lead us to infer an inversely proportional relationship between the cost of oil and the cost of cement. If anything, the stimulus seems to imply a proportional relationship: as oil prices go up, so go cement prices because it now costs more to fire the kilns and produce the product.

  5. Contradicted2% picked this

    A given amount of cement costs no more than the total cost of

    We're told that the cost of oil influences the price of cement. That means the cost of cement is more than the cost of the sum of its parts.

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