Logical ReasoningDifficulty: Medium

PT137 S4 Q25 Explanation

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

TopicsParallel Flaw

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Stimulus

Advertisement: The dental profession knows that brushing with Blizzard toothpaste is the best way to fight cavities. We surveyed five dentists, and each agreed that the tartar control formula found in formula available in a toothpaste.

What this question is testing

Parallel Flaw

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
25.

The flawed reasoning in which one of the following is most similar to the flawed reasoning

Answer choices

  1. Trap7% picked this

    The nation's voters know that Gomez is the candidate whose policies would be best for the nation. Of ten voters polled, each said that

  2. Trap6% picked this

    Some of the nation's voters believe that Gomez is the candidate who would be best for the nation. Of the ten voters we surveyed,

  3. Trap3% picked this

    The nation's voters generally believe that Gomez is the candidate who would be best for the nation. We polled thousands of voters in the

  4. Correct77% picked this

    The nation's voters know that electing Gomez would be the best way to help the nation. The ten voters we polled all agreed that

    Why this is right

    Answer D is correct.

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

  5. Trap7% picked this

    We know that electing Gomez would be the best course for the nation to follow because, of ten voters we surveyed, each agreed that

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