Logical ReasoningDifficulty: Easy

PT149 S4 Q1 Explanation

Dentist: I recommend brushing

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

TopicsParadox

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Stimulus

Dentist: I recommend brushing one's teeth after every meal to remove sugars that facilitate the growth of certain bacteria; these bacteria produce acid that dissolves minerals in tooth enamel, resulting in cavities. And when brushing is not contains sugar—to prevent the formation of cavities.

What this question is testing

Paradox

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, if true, would most help to reconcile the dentist's

Answer choices

  1. Trap6% picked this

    A piece of chewing gum that contains sugar contains far less sugar than does

  2. Trap1% picked this

    Tooth decay can be stopped and reversed if it is caught before

  3. Correct92% picked this

    Chewing gum stimulates the production of saliva, which reduces acidity in the mouth and helps

    Why this is right

    Answer C is correct.

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

  4. Trap1% picked this

    Sugars can be on teeth for as long as 24 hours before the teeth-damaging bacteria whose growth they

  5. Trap0% picked this

    Chewing gum exercises and relaxes the jaw muscles and so contributes to the overall health

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