Reading ComprehensionDifficulty: Easy

PT129 S4 P4 Q23 Explanation

Fractal Geometry

A free, expert breakdown of this official LSAT Reading Comprehension question.

TopicsLocal PurposeScience

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Passage

Fractal geometry is a mathematical theory devoted to the study of complex shapes called fractals. Although an exact definition of fractals has not been established, fractals commonly exhibit the property of self-similarity: the reiteration of irregular details or patterns at progressively smaller scales so that each part, when magnified, looks basically like and then the process is repeated indefinitely on the segments at each stage of the construction.

Self-similarity is built into the construction process by treating segments at each stage the same way as the original segment was treated. Since the rules for getting from one stage to another are fully explicit and always the same, images of successive stages of the process can be generated by computer. Theoretically, illustrates a major attraction of fractal geometry: simple processes can be responsible for incredibly complex patterns.

A worldwide public has become captivated by fractal geometry after viewing astonishing computer-generated images of fractals; enthusiastic practitioners in the field of fractal geometry consider it a new language for describing complex natural and mathematical forms. They anticipate that fractal geometry's significance will rival that of calculus and expect that proficiency in in mathematics only if it becomes a precise language supporting a system of theorems and proofs.

What this question is testing

Local Purpose

Your task

Identify why the author included the referenced detail at that point in the passage — its function, not its content.

Common trap

Answers that merely repeat or summarize the topic of the detail instead of describing the role it plays.

Winning move

Ask what job the detail does for the paragraph, then for the passage's broader point.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
23.

The explanation of how a Koch curve is generated (first paragraph) serves

Answer choices

  1. Out of Scope: traditional geometry4% picked this

    show how fractal geometry can be reduced to

    This sounds sort of like the opposite of what we were looking for, which was "to provide some insight into fractal geometry". It wouldn't be much of an insight to say, "It's really just traditional geometry".

  2. Out of Scope: natural form10% picked this

    give an example of a natural form that can be described

    Is the Koch curve a natural form? No, it's just a random process that some person named Koch came up with.

  3. Out of Scope0% picked this

    anticipate the objection that fractal geometry is not a

    Out of Scope: not a precise language There's nothing in this first paragraph that seems like it's worried that some people will object to fractal geometry and say, "Hey, that's not a precise language".

  4. Correct82% picked this

    illustrate the concept of

    Why this is right

    This answer is a little surprising, but it's the only eligible answer and the only answer that reinforces language from the first paragraph. We were looking for "provides some insight into fractal geometry", and the 2nd sentence indicated that fractals commonly exhibit the property of self-similarity. So we can be at peace with combining these two: the Koch curve was explained in order to provide some insight into how fractals are self-similar. Through the explanation, we were provided with an example of "the reiteration of irregular details (the pointed protrusion in the middle) at progressively smaller scales".

    Skill tested: Local Purpose · how this choice captures the passage's function is the move to repeat next time.

  5. Too Strong: exact3% picked this

    provide an exact definition of

    The 2nd sentence all but contradicts this, as it says that "an exact definition of fractals has not been established". The author isn't stepping in to say, "I'll be the hero, everyone. Here is the exact definition of fractals."

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