Critical Reasoning: Argument Evaluation

Read the argument below and match each boldfaced statement to its precise structural role within the reasoning.

Some urban planners claim that the city council should not enact the proposed mandate requiring all new commercial buildings to install reflective white roofs. These planners contend that white roofs rapidly accumulate atmospheric soot, rendering them ineffective within two years. However, long-term field testing demonstrates that periodic rainfall naturally washes away over 85 percent of soot deposits from modern reflective roofing materials. Therefore, dirt accumulation does not significantly diminish the long-term cooling efficiency of white roofs, and the council should proceed with implementing the mandate.

To combat declining municipal revenues from downtown parking meters, the city council of Elmridge plans to eliminate the two-hour parking limit on all downtown streets. Council members argue that allowing drivers to park indefinitely will encourage visitors to spend more time dining and shopping in the downtown district, thereby increasing local business sales and boosting the city's sales tax revenues.

Which of the following, if true, most seriously weakens the city council's argument?

To decrease total operating expenses, the Fairview Municipal Water District plans to install bio-purification filters upstream of its primary membrane filtration system. Water district officials note that microplastic debris currently clogs and damages the delicate membrane filters, requiring $2 million annually in replacement and repair costs. Because the new bio-purification filters effectively capture over 90 percent of incoming microplastics before they reach the primary membranes, officials conclude that installing these bio-filters will significantly reduce the facility's overall annual operating costs.

Which of the following, if true, most seriously weakens the water district officials' argument?

To reduce regional water consumption, an agricultural cooperative plans to distribute automated soil-moisture sensors to all member farms. The sensors send real-time alerts whenever soil moisture drops below an optimal threshold, allowing farmers to irrigate only when necessary rather than on a fixed calendar schedule. The cooperative's directors conclude that installing these sensors will significantly decrease total agricultural water usage across the region over the next two years. Which of the following, if true, most seriously weakens the directors' argument?

A recent study observed that city residents who regularly visit public parks report lower average stress levels than residents who rarely visit parks. Based on this observation, the city council concluded that spending time in public parks directly causes a reduction in stress levels for city residents. The reasoning in the city council's argument is most vulnerable to criticism on which of the following grounds?

To increase household incomes in underdeveloped agricultural districts, a telecommunications company plans to deploy low-cost satellite internet service across remote farming villages. The company contends that providing farmers with real-time commodity prices and hyper-local weather forecasts through a mobile application will allow them to optimize their harvest timing and crop sales strategies, thereby substantially raising their net earnings.

Which of the following, if true, most seriously weakens the telecommunications company's argument?

To increase overall bus ridership, the Metro Transit Authority plans to equip all express buses with Transit Signal Priority (TSP) technology. This system communicates with traffic lights to extend green light durations when an express bus approaches an intersection, thereby shortening trip times on express routes. The Authority reasons that by reducing travel times for express bus passengers, deploying TSP on express routes will lead to a net increase in the city's total daily bus ridership.

Which of the following, if true, most seriously weakens the Metro Transit Authority's argument?

A commercial shipping line plans to apply a newly developed acoustic barnacle-repellent coating to the hulls of all its ocean-going container ships. Preliminary testing indicates that by preventing marine biofouling, the coating reduces hydrodynamic drag and decreases annual fuel consumption per vessel by 12 percent. Based on these fuel savings, management concludes that the financial savings from decreased fuel consumption will fully offset the high initial cost of purchasing and applying the coating within two years. Which of the following inquiries would be most useful to evaluate the validity of management's conclusion?

A tech firm observed that employees who voluntarily chose to work remotely reported higher job satisfaction than those who worked in the office. Based on this observation, management concluded that transitioning all employees to remote work will increase overall employee job satisfaction across the company. Which of the following, if true, most seriously weakens management's conclusion?

Following a major revision to its regulatory standards, an international financial oversight agency began conducting unannounced cybersecurity audits of commercial banks. To avoid severe regulatory fines for non-compliance, virtually all audited banks substantially increased their annual expenditure on advanced threat-detection software and external consulting over the subsequent two years. Surprisingly, data collected at the end of this two-year period revealed that the average financial loss per successful cyberattack at these audited banks increased by over 40 percent, whereas the average loss per successful cyberattack at unaudited financial institutions remained completely unchanged. Which of the following, if true, most helps to account for the apparent discrepancy described above?

In 2024, a metropolitan public transit authority replaced its flat-fare structure on suburban commuter lines with a distance-based pricing model, resulting in a 25 percent increase in the average price of long-distance single-ride suburban tickets. Transit analysts predicted this fare hike would decrease total single-ride passenger volume on suburban lines. Surprisingly, over the subsequent twelve months, total single-ride passenger trips recorded across the suburban network increased by 15 percent, even though suburban population growth remained static and no new residential developments were constructed. Which of the following, if true, most helps to resolve the apparent discrepancy described above?

To reduce municipal water consumption during severe dry spells, the city of Oakhaven plans to install smart water meters for all residential customers and charge a steep surge tariff whenever an individual household's weekly water usage exceeds a baseline threshold. The city council projects that this financial disincentive will prompt residents to curb non-essential outdoor watering, thereby lowering total municipal water demand by 20 percent over the next summer. Which of the following would it be most useful to determine in evaluating whether the city council's plan will achieve its intended goal?

A regional health authority recently mandated that all public hospitals in the province implement a post-discharge digital health monitoring application for heart failure patients. Over the two years following the mandate, readmission rates for heart failure patients at these hospitals dropped by 22 percent. The health authority concluded that the remote monitoring application was directly responsible for the reduction in patient readmissions.

Which of the following would it be most useful to establish in order to evaluate the health authority's conclusion?

To mitigate severe summer train delays caused by the thermal expansion of steel tracks, a municipal transit authority plans to coat all exposed rail lines with a solar-reflective ceramic finish. In pilot testing conducted on an unused, stationary track segment, the coating reduced peak surface temperatures by 15°C, keeping the metal well below the critical temperature at which heat-induced warping occurs. The authority concludes that implementing this coating systemwide will successfully eliminate heat-related train slowdowns. Which of the following, if true, most seriously undermines the transit authority's conclusion?

To reduce order fulfillment errors caused by manual sorting, a major online retailer plans to deploy Autonomous Mobile Robots (AMRs) across all its regional distribution centers. Management notes that in pilot tests at a prototype facility, the automated sorting system reduced mispackaged shipments by 80 percent compared to human sorters. Therefore, management concludes that deploying AMRs nationwide will significantly lower overall operational costs associated with shipping errors.

Which of the following, if true, most seriously weakens management's argument?

Historians analyzing early twentieth-century iron gall ink manuscripts observed that documents stored in wooden cabinets suffered significantly less paper degradation than identical manuscripts stored in metal cabinets within the same archive room. The archivists concluded that volatile organic compounds emitted by the untreated cedar wood reacted with atmospheric moisture to form a protective barrier on the paper surface, thereby inhibiting acid hydrolysis of the cellulose fibers.

Which of the following, if true, provides the strongest support for the archivists' conclusion?

A bookstore chain recently added coffee cafes inside all of its retail locations to boost overall bookstore sales. During the twelve months following the installation of the cafes, total sales at these bookstores increased by 15 percent. The management concluded that adding the cafes was the primary cause of the increase in sales. Which of the following, if true, most seriously weakens the management's argument?

A local agricultural extension office recently advised fruit orchard owners to plant wildflower strips along the perimeter of their crop fields. The office reasoned that these wildflower strips would attract a larger population of wild bees, which in turn would increase pollination and boost overall fruit yields per acre.

Which of the following, if true, most seriously weakens the extension office's argument?

A water utility company in a drought-prone city plans to install automated pressure-regulating valves across its subterranean pipe network. The utility argues that by dynamically reducing water pressure during low-usage overnight hours, it will significantly decrease the total volume of water lost through minor background pipe leaks across the city.

Which of the following, if true, provides the strongest support for the water utility company's argument?

Historians studying 19th-century agrarian developments have long maintained that the adoption of synthetic nitrate fertilizers was the primary catalyst for the dramatic increase in agricultural yields across Northern Europe. However, recent archival evidence indicates that the widespread implementation of tile drainage systems preceded the mass commercial availability of synthetic nitrates by nearly two decades. Because crop roots cannot absorb soil nutrients effectively in waterlogged fields, the efficiency of any added chemical fertilizer remains severely constrained without prior soil drainage. Therefore, the introduction of synthetic fertilizers merely amplified a productivity trend that was already well underway due to soil infrastructure improvements, rather than serving as its fundamental trigger.

In the argument above, what are the roles played by the two boldfaced portions?