Logical Reasoning

Match each of the following municipal policy decisions to the general administrative principle that most directly justifies it:

Economist: Some regulators propose banning dynamic pricing algorithms in the airline industry, arguing that these systems implicitly facilitate collusion. This proposed ban is misguided. It is true that these algorithms sometimes independently converge on supra-competitive prices. However, a ban would also eliminate their capacity to instantaneously adjust to fluctuating fuel costs, a feature that significantly lowers fares for off-peak travelers. Ultimately, eliminating this efficiency would cause average ticket prices to rise, thereby harming the very consumers the regulators wish to protect.

Which of the following most accurately describes the role played in the economist's argument by the statement that these algorithms sometimes independently converge on supra-competitive prices?

Analyze the cognitive scientist's argument below. To make the conclusion logically valid, you must supply the missing conditional premise. Fill in the blanks using the exact terminology from the argument to construct the precise sufficient assumption.

Match each of the following financial regulatory determinations regarding automated lending systems to the general administrative principle that most directly justifies it:

Ethologist: In social marine mammals, juvenile play behavior occurs almost exclusively when individuals feel secure. Researchers recently observed that a captive group of juvenile dolphins engaged in complex acrobatic play sequences only during periods when ambient noise from nearby harbor construction dropped below 55 decibels. We can conclude, therefore, that maintaining ambient underwater noise below 55 decibels is sufficient to guarantee that these dolphins will engage in acrobatic play.

The ethologist's reasoning is most vulnerable to criticism on the grounds that it does which one of the following?

Match each of the following institutional scenarios (Left) to the abstract normative principle (Right) that most strictly governs and justifies the logical reasoning applied in the scenario.

Carefully analyze the four arguments presented on the left. Match each stimulus to the abstract description on the right that most accurately identifies its pattern of reasoning or its logical flaw.

A wildlife conservation team observed that a local population of river otters experienced a substantial increase in breeding success shortly after commercial fisheries in the river basin switched from traditional nylon nets to a newly designed biodegradable netting. The team concluded that the transition to biodegradable netting was directly responsible for the rebound in the otter population.

Which of the following, if true, most strengthens the conservation team's argument?

For each flawed argument presented in the first column, determine the primary reasoning error that it commits. Match each argumentative passage with the abstract description that most accurately identifies its underlying logical vulnerability.

Archivists examining medieval mercantile guilds in the Rhine Valley have established the following records:

• Every guild granted an imperial customs exemption operated at least one bonded river quay.
• Some guilds that operated bonded river quays were not permitted to mint local coinage.
• Any guild that maintained a sworn arbitration council was permitted to mint local coinage and held an imperial customs exemption.
• No guild that failed to maintain a sworn arbitration council was authorized to levy warehouse tariffs.

If the statements above are true, which one of the following must also be true?

Nutritionist: Some diet advocates claim that avoiding all dietary fats is necessary for maintaining a healthy cardiovascular system. However, this claim is mistaken. Certain fats, such as omega-3 fatty acids found in flaxseeds and walnuts, actually lower the risk of arterial inflammation and promote heart health.

Which of the following most accurately describes the method of reasoning employed by the nutritionist?

Historians studying a nineteenth-century coastal port observed that merchant shipping logs recorded a sharp decrease in shipwrecks near a treacherous submerged reef following the construction of a lighthouse in 1842. Based on this correlation, the historians concluded that the beam from the new lighthouse was directly responsible for the reduction in wrecks by warning navigators away from the hazard.

Which of the following, if true, most strengthens the historians' argument?

Last year, the city of Riverdale replaced all standard streetlights in its downtown commercial district with much brighter LED lights in an effort to reduce nighttime pedestrian trip-and-fall accidents. However, hospital records indicate that the number of pedestrians treated for injuries resulting from nighttime trip-and-fall accidents in that district increased significantly over the following year.

Which of the following, if true, most helps to resolve the apparent discrepancy described above?

Consider the following flawed arguments and their corresponding reasoning vulnerabilities. Match each argument with the description that most accurately identifies the primary flaw in its reasoning.

Soil scientist: Conventional agricultural wisdom holds that planting legume cover crops between growing seasons enriches soil fertility solely by fixing atmospheric nitrogen. However, this view is incomplete. When non-nitrogen-fixing brassica cover crops are planted instead, soil nitrogen retention across subsequent crop rotations matches that achieved with legumes, even though brassicas fix no atmospheric nitrogen at all. Therefore, the primary mechanism by which cover crops preserve soil nitrogen is not biological fixation, but rather the physical prevention of nitrate leaching by dense root networks.

Which one of the following most accurately describes the method of reasoning employed in the soil scientist's argument?

Editorial: Any municipal infrastructure initiative that receives federal matching funds must undergo an environmental impact assessment. Most municipal initiatives that undergo an environmental impact assessment experience significant construction delays. Therefore, any municipal infrastructure initiative that receives federal matching funds will likely experience significant construction delays.

Which of the following arguments exhibits a flawed pattern of reasoning most similar to that in the editorial's argument?

Over the past three years, the coastal wildlife preserve of Marelton enforced a strict ban on recreational motorboats in its shallow estuaries to protect endangered eelgrass beds from propeller scarring. However, aerial surveys conducted at the end of the three-year period revealed that the total area of damaged eelgrass beds in these estuaries increased significantly compared to the three years preceding the ban.

Which of the following, if true, most helps to resolve the apparent discrepancy described above?

Consider the following argument regarding agricultural soil conservation:

Some agronomists argue that cover cropping is too labor-intensive to justify its adoption on family farms. However, this view fails to account for long-term soil regeneration. Recent agricultural trials demonstrate that cover crops significantly reduce topsoil erosion during winter rains. Reduced erosion preserves vital soil nutrients year after year. Therefore, implementing cover crops ultimately increases long-term farm profitability.

Match each excerpt from the argument to the exact functional role it plays in the reasoning.

Civil Engineer: To ensure that a suspension bridge remains structurally sound under extreme wind conditions, the bridge's main cables must undergo ultrasonic tension testing. The inspection crew completed ultrasonic tension testing on the main cables of the Riverview Bridge last week. Thus, the Riverview Bridge is guaranteed to remain structurally sound during the upcoming severe storm.

Which of the following most accurately describes the flaw in the civil engineer's reasoning?

Every industrial facility that implements closed-loop solvent recycling reduces its hazardous wastewater discharge by more than 80 percent. No industrial facility operating in the river basin reduced its hazardous wastewater discharge by more than 80 percent last year unless it received a green modernization subsidy from the municipal environmental authority. Furthermore, any facility that received a green modernization subsidy was subject to unannounced quarterly compliance audits. Apex Chemical, an industrial facility operating in the river basin, was not subject to unannounced quarterly compliance audits last year.

If the statements above are true, which one of the following must also be true on the basis of them?