Logical ReasoningDifficulty: Hard

PT124 S3 Q13 Explanation

Each of the smallest particles

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

TopicsParallel Flaw

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Stimulus

Each of the smallest particles in the universe has an elegantly simple structure. Since these particles compose the universe, we can conclude that an elegantly simple structure.

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
13.

Each of the following arguments exhibits flawed reasoning similar to that in the

Answer choices

  1. Match: Part vs. Whole22% picked this

    Each part of this car is nearly perfectly engineered. Therefore this car is nearly perfect, from an

    This matches. You could have well engineered car parts but assemble them in a random way that wouldn’t make the entire car seem well engineered.

  2. Correct67% picked this

    Each part of this desk is made of metal. Therefore this desk is

    Why this is right

    This doesn’t match. Even though it makes a part to whole move, it isn’t one we could object to. It’s true to say that if every part of something is metal, then that entire thing is metal.

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

  3. Matches: Part vs. Whole5% picked this

    Each brick in this wall is rectangular. Therefore this wall

    This matches. You could arrange rectangular bricks into lots of different shapes, so just because each brick is rectangular in shape we can’t infer that the resulting shape of combining them will be rectangular.

  4. Matches: Part vs Whole2% picked this

    Each piece of wood in this chair is sturdy. Therefore this

    This matches. You could have sturdy pieces of wood that are barely glued together to make an unsturdy chair.

  5. Matches: Part vs Whole5% picked this

    Each sentence in this novel is well constructed. Therefore this is

    This matches. You could have well-constructed sentences that still have no connection to each other and don’t present any discernible or compelling narrative, so the novel could still be poorly constructed.

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