Role of a Detail
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LSAT Reading › Role of a Detail
In the passage, the statement that a meta-analysis found effort-correction models typically absorbed about 70 percent of the variance attributable to observer differences serves which one of the following functions?
It acknowledges that citizen science data are too biased to be used for baseline reconstruction.
It restates the main conclusion that management targets should not be set by nostalgia.
It introduces a new type of data that the author prefers over diaries and logbooks.
It supports the claim that known biases in historical records can be modeled and mitigated, though not eliminated.
It defines the term "triangulation" as used in the following paragraph.
Explanation
By quantifying how much variance can be absorbed, the statistic bolsters the feasibility of modeling biases rather than abandoning the data. The other choices misread it as a concession of futility, a definition, a shift in data preference, or a restatement of the main conclusion.
What is the primary function of the discussion of the Mount Pinatubo eruption in the second paragraph?
To demonstrate that volcanic eruptions dominate climate variability on centennial timescales.
To identify the principal basis for the author's preferred estimate of climate sensitivity.
To exemplify a natural experiment that helps calibrate model timescales and supports the argument for combining heterogeneous lines of evidence.
To undermine the credibility of climate models by showing they failed to predict a short‑term cooling event.
To introduce an analogy for anthropogenic aerosol forcing that the author ultimately rejects as misleading.
Explanation
Pinatubo is presented as a useful quasi-experiment for calibrating model responses, illustrating the value of converging evidence. It is not used to discredit models, serve as a rejected analogy, provide the sole basis of an estimate, or claim volcanic dominance.
The author mentions the 2019 study of Phoenix neighborhoods reporting fewer trees on blocks with more renters primarily to do which of the following?
Illustrate that Phoenix is an outlier and thus not instructive for other cities.
Define the heat island effect in technical terms to set up the discussion of mitigation.
Provide empirical support for the claim that tree canopy is unequally distributed along social lines.
Argue that renters generally prefer not to have trees planted near their homes.
Acknowledge a limitation of cool roof technologies by highlighting their uneven adoption.
Explanation
The study is cited as evidence that canopy correlates with social factors like renter share, supporting the equity argument. It does not define a term, critique cool roofs, infer renter preferences, or treat Phoenix as an outlier.
The quoted observation that the herd will not cross when the river's 'skin' is sick serves which one of the following functions?
To concede that even improved models will remain imprecise in shoulder seasons
To identify a limitation specific to satellite sensors' spatial resolution
To exemplify an indigenous insight that, once translated into measurable terms, enhances the scientific model
To summarize the main conclusion that integrative models outperform satellite-only approaches
To argue that metaphorical descriptions are unsuitable for scientific inquiry
Explanation
The remark exemplifies a local observation that, when operationalized, becomes a valuable predictor in the model. The other options either misstate the passage's thesis, introduce limitations not tied to the quote, or denigrate metaphor in a way the author does not.
In the passage, the statement that a 2019 municipal study found a 15 percent reduction in summer electricity use in neighborhoods with mature tree cover serves which one of the following functions?
It introduces a competing view that questions whether tree canopies actually reduce urban heat.
It defines what the author means by the term "green infrastructure."
It provides concrete empirical support for the claim that trees yield measurable cost savings.
It acknowledges a limitation of relying on anecdotal reports about neighborhood comfort.
It illustrates how utility companies calculate peak-demand charges during heat waves.
Explanation
The study is cited as specific evidence that canopy reduces electricity use, bolstering the author's cost-savings argument. The other choices either miscast it as a definition, concession, competing view, or a procedural description not at issue.
The statistic that a 2019 citywide survey found 62% of residents used a pocket park at least once a week serves which one of the following functions?
To introduce a definition of the term 'pocket park'
To state the main conclusion that pocket parks should be prioritized across the entire city
To provide empirical support for the passage's claim that proximity enables frequent, cumulative use of small parks
To concede that large parks remain essential for certain activities
To present a counterexample showing that pocket parks typically sit empty
Explanation
It supplies evidence that frequent use is a distinctive advantage of small nearby spaces. The other options misstate the main point, mischaracterize the statistic, or describe different portions of the passage.
In the second paragraph, the quotation from Justice Brandeis that "sunlight is said to be the best of disinfectants" serves primarily to do which of the following?
State the passage's main conclusion that administrative agencies are always democratically legitimate.
Define the term progressive-era oversight so it can be applied in later examples.
Invoke a concise historical endorsement of transparency to bolster the claim that oversight practices can legitimate agency action.
Demonstrate that courts have consistently invalidated agency actions lacking disclosure rules.
Introduce a counterargument suggesting that transparency undermines effective governance.
Explanation
The quote lends rhetorical and historical support to the author's point that transparency-based tools can ground legitimacy. It neither states the main point, presents a counterargument, provides a definition, nor claims uniform judicial outcomes.
In the third paragraph, the author's observation that auction prices for quilts remain far below those of comparably sized canvases serves primarily to do which of the following?
Underscore the persistence of institutional undervaluation despite growing recognition of quilts' aesthetic innovations.
Suggest that art markets are largely indifferent to the medium or context of production.
Refute the claim that quilts enjoy greater cultural resonance than paintings among collectors.
Show that museums have already corrected past misclassifications over time.
Quantify the production costs that distinguish quilts from studio paintings.
Explanation
The price comparison highlights enduring undervaluation even as curatorial attitudes shift. It does not weigh cultural resonance, claim indifference to medium, show full correction, or address costs.
The author uses the 'sharp, chronological decline in Mediterranean forest species' primarily as evidence to support which of the following claims?
A severe drop in precipitation fundamentally altered the region's climate.
Palynological data often contradicts the written records of ancient Egyptian texts.
The Sea Peoples were responsible for the deforestation of the Levant.
The interconnected palace economies collapsed due to agricultural mismanagement.
Steppe flora aggressively outcompetes forest species regardless of rainfall.
Explanation
The sediment core data — the decline in forest species and rise in steppe flora — is introduced as evidence 'indicating a severe and prolonged drop in precipitation,' directly supporting the megadrought hypothesis. (A) directly contradicts the passage's argument, which positions the Sea Peoples as a consequence of the climate-driven collapse rather than a cause of environmental change. (B) is out of scope; the passage does not characterize palynological data as generally contradictory to ancient texts.
The author mentions developers redirecting capital to unregulated housing markets primarily to provide evidence that:
rent price ceilings suppress the construction of new housing units in regulated areas.
neighboring jurisdictions often have more favorable tax incentives for housing development.
housing misallocation is an unavoidable consequence of gentrifying urban neighborhoods.
rent control policies successfully stabilize vulnerable, low-income communities.
older empty nesters are reluctant to move to smaller, market-rate units.
Explanation
Classical economists argue rent control 'suppresses the construction of new housing units,' and the developer behavior provides the mechanism: facing capped returns, developers 'predictably redirect their capital to unregulated housing markets.' The redirection is evidence for the supply-suppression claim. (A) represents the opposing advocate position, which the economist argument is challenging. (E) conflates housing misallocation — a secondary effect described in the second paragraph — with the supply-suppression claim the developer detail is introduced to support.