Examkin

Critical Reasoning: Discrepancies and Flaws

65 soru

Tüm türler65Çoktan seçmeli50Doğru / Yanlış11Eşleştirme4
Soru 1Soru →

Over the past year, a gourmet coffee subscription company recorded a significant increase in the total number of monthly account cancellations. However, during that same year, the company's monthly cancellation rate—defined as the percentage of total active subscribers who canceled their accounts each month—steadily decreased.

Which of the following, if true, best helps to resolve the apparent paradox described above?

Cevabı ve açıklamayı göster

Cevap: The total number of active subscribers to the coffee service increased substantially over the course of the year.

Cevap

The total number of active subscribers to the coffee service increased substantially over the course of the year.
The correct answer resolves the paradox by identifying a shift in the overall subscriber base. Total cancellations equal the cancellation rate multiplied by the total number of active subscribers. If the total subscriber base grew substantially, a lower percentage cancellation rate would still yield a higher absolute number of cancellations.

Adım Adım Çözüm

1
Identify the two contradictory facts in the stimulus.
Fact 1: Total monthly cancellations increased. Fact 2: The monthly cancellation rate (percentage of active subscribers canceling) decreased.
Resolving a paradox requires finding an underlying factor that allows both facts to exist simultaneously without denying either premise.
2
Analyze the relationship between rate and total volume.
Total Cancellations = (Total Active Subscribers) × (Cancellation Rate).
If the cancellation rate drops while the total number of cancellations increases, the total number of active subscribers must have expanded.
3
Evaluate the option choices to find the statement establishing subscriber base growth.
The option stating that active subscribers increased substantially provides the missing mathematical linkage.
A much larger denominator (total active subscribers) yields a higher total count of cancellations even when the percentage fraction is smaller.

Anahtar Kavram

Resolving Rate versus Total Volume Discrepancies
Soru 2Soru →

A metropolitan transit authority recently installed automated, contactless payment turnstiles across its subway network, allowing commuters to tap credit cards directly rather than purchasing paper farecards. Following the installation, queue times at station entrances decreased significantly, and recorded incidents of gate-jumping fare evasion dropped by 40 percent. However, during the six months after the rollout, total fare revenue collected by the transit authority decreased by 12 percent compared to the same period in the previous year, despite total ridership remaining constant and base ticket prices remaining unchanged. Which of the following, if true, most helps to resolve the apparent discrepancy described above?

Cevabı ve açıklamayı göster

Cevap: The new turnstile software immediately released the gate latch upon detecting any contactless card, but deferred card balance authorization until off-peak hours, allowing commuters with inactive or over-limit cards to pass through without successfully settling their fares.

Cevap

The resolution is that the new turnstiles granted access upon card detection but deferred account authorization to off-peak hours, allowing users with invalid or over-limit cards to enter without successfully paying their fares.
The correct answer resolves the paradox by bridging the gap between gate compliance and payment settlement. Because turnstiles unlocked upon detecting a card tap but deferred bank authorization until later, riders with invalid or over-limit cards walked through normally (reducing visible gate-jumping fare evasion and entrance queues) but ultimately failed to generate successfully settled fare revenue.

Adım Adım Çözüm

1
Identify the two seemingly contradictory facts presented in the stimulus.
Fact 1: Turnstile queues and gate-jumping fare evasion decreased by 40%, while ridership and ticket prices remained constant. Fact 2: Total collected fare revenue dropped by 12%.
Resolving a paradox requires finding a piece of information that allows both facts to be true at the same time.
2
Analyze what mechanism could cause recorded gate compliance to rise while actual money collected falls.
The mechanism must involve a scenario where riders interact with the turnstiles legitimately (lowering recorded gate-jumping), yet valid payment is not actually captured.
If riders appear compliant at entry but fail to yield financial settlement, revenue will drop despite normal ridership and seemingly high gate compliance.
3
Evaluate the correct resolution choice against the two facts.
Deferred payment processing explains both: commuters tapped cards (eliminating gate-jumping and queues), but their payments were rejected later during off-peak processing, leading to uncollected revenue.
It directly reconciles the tension without denying either premise.

Anahtar Kavram

Resolving Paradoxes and Discrepancies
Soru 3Soru →

To evaluate overall soil health and nutrient depletion across a 10,000-acre agricultural region, researchers analyzed soil samples collected exclusively from farms that had reported record-low crop yields during the previous harvest season. Finding that 90 percent of the collected samples exhibited severe nitrogen deficiency, the researchers concluded that the soil throughout the entire region is critically depleted of nitrogen. Which of the following best describes a flaw in the researchers' reasoning?

Cevabı ve açıklamayı göster

Cevap: It draws a sweeping conclusion about the entire region from a sample that is disproportionately drawn from farms prone to poor soil quality.

Cevap

The argument is flawed because it draws a broad conclusion about the entire region from a sample that is disproportionately drawn from farms prone to poor soil quality.
The correct answer identifies a classic selection bias flaw. The researchers attempted to draw a conclusion about all soil across a 10,000-acre region, but gathered data exclusively from farms that experienced record-low crop yields. Farms with poor yields are significantly more likely to have depleted soil than average farms, making the sample unrepresentative of the region as a whole.

Adım Adım Çözüm

1
Identify the conclusion and premises
Premise: 90 percent of soil samples taken from low-yield farms showed severe nitrogen deficiency. Conclusion: Soil throughout the entire 10,000-acre region is critically depleted of nitrogen.
Understanding the structural leap from premise to conclusion reveals how the argument arrives at its claim.
2
Evaluate the sample selection method
The sample was drawn exclusively from farms that suffered record-low crop yields, rather than from a randomized cross-section of the region.
Sampling only underperforming farms introduces selection bias, making the sample unrepresentative of healthy or average farms in the area.
3
Select the option that identifies this unrepresentative sampling flaw
The option highlighting that the conclusion relies on a sample disproportionately drawn from farms prone to poor soil quality directly identifies the unrepresentative sampling vulnerability.
An unrepresentative sample cannot justify a general conclusion about an entire population or area.

Anahtar Kavram

Sampling and Generalization Flaws
Soru 4Soru →

In an effort to reduce operating expenses, a major maritime freight carrier replaced its entire fleet of traditional steel shipping containers with newly engineered carbon-fiber containers that are 25 percent lighter. The carrier anticipated a significant drop in fuel consumption because vessel displacement was reduced while payload volume per voyage remained identical. However, during the year following the complete container replacement, the average quantity of fuel consumed per ton-mile of freight transported across the carrier's ocean routes increased by nearly 6 percent. Which of the following, if true, most helps to resolve the apparent paradox described above?

Cevabı ve açıklamayı göster

Cevap: Because the carbon-fiber containers were substantially lighter, vessels carrying them rode higher in the water, exposing a larger cross-section of the hull to surface winds and hydrodynamic turbulence that required significantly more engine power to maintain cruising speed.

Cevap

The apparent paradox is resolved by the option explaining that lighter containers caused vessels to ride higher in the water, thereby increasing aerodynamic and hydrodynamic drag and forcing engines to burn more fuel to maintain standard speeds.
The correct answer identifies a secondary hydrodynamic consequence of the weight reduction: because the lighter containers reduced vessel draft, more of the ship's hull was exposed above the waterline. The resulting wind and surface turbulence resistance demanded increased engine output to sustain cruising speed, neutralizing the mass benefit and driving up fuel consumption per ton-mile.

Adım Adım Çözüm

1
Identify the two seemingly contradictory facts in the stimulus.
Fact 1: Carbon-fiber containers are 25% lighter, reducing ship displacement with identical payload volume. Fact 2: Fuel consumed per ton-mile across ocean routes increased by 6% after replacing the containers.
Resolving a paradox requires finding a missing factor that allows both facts to be simultaneously true without denying either premise.
2
Evaluate the mechanism required to reconcile the premises.
The correct explanation must show how the reduction in container weight directly or indirectly caused an operational inefficiency that outweighed the expected energy savings.
A valid resolution introduces a third variable that accounts for the unexpected negative outcome resulting from the initial change.
3
Assess the correct choice against the required mechanism.
The statement regarding vessel draft explains that lighter weight caused ships to sit higher in the water, increasing exposure to wind and surface turbulence. Overcoming this extra drag required more engine power than was saved by the lower mass, explaining the 6% increase in fuel burn per ton-mile.
This logical bridge reconciles the 25% mass reduction with the 6% fuel consumption increase.

Anahtar Kavram

Resolving Paradoxes through Confounding Physical and Operational Side Effects
Soru 5Soru →

A municipal health board announced that implementing a comprehensive vector-control program is essential for eliminating endemic dengue transmission in urban districts. Last year, the city of Solaria fully funded and executed a comprehensive vector-control program across all its urban districts. Therefore, city health officials concluded that endemic dengue transmission has now been successfully eliminated in Solaria.

Which of the following best describes the reasoning vulnerability in the health officials' argument?

Cevabı ve açıklamayı göster

Cevap: It treats a condition that is required for eliminating dengue transmission as though it is sufficient to guarantee that elimination.

Cevap

The argument treats a condition that is necessary for eliminating dengue transmission as though it were sufficient to guarantee that outcome.
The correct answer accurately identifies the core logical flaw: the premise states that a comprehensive vector-control program is 'essential' (necessary) for eliminating dengue transmission. However, the health officials conclude that merely executing this program guarantees that dengue transmission has been eliminated. This treats a necessary prerequisite as a sufficient condition for success.

Adım Adım Çözüm

1
Identify the premises and conclusion
Premise: Vector-control program is essential (necessary) for dengue elimination. Premise: Solaria implemented the program. Conclusion: Dengue transmission has been eliminated.
Deconstructing the argument structure clarifies the underlying conditional claims.
2
Analyze the conditional logic relationship
The word 'essential' indicates that Vector-Control is a necessary condition for Dengue Elimination. Implementing Vector-Control does not automatically guarantee Elimination.
Differentiating between necessary and sufficient conditions reveals whether the premise logically justifies the conclusion.
3
Pinpoint the logical error
The health officials assume that satisfying a necessary condition guarantees the outcome, thereby confusing a necessary condition for a sufficient one.
Satisfying a prerequisite does not ensure success if other necessary conditions remain unfulfilled.

Anahtar Kavram

Confusing Necessary and Sufficient Conditions
Tahmini Süre:2m 0s
Soru 6Soru →

In 2025, a nationwide logistics firm installed AI-driven route optimization software across its entire delivery fleet to reduce fuel consumption per trip. Over the following year, fuel prices remained completely stable, and the average fuel consumed per delivery dropped by 15 percent. Paradoxically, the firm's total annual fuel expenditure for the fleet increased by more than 10 percent over the same period.

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

Cevabı ve açıklamayı göster

Cevap: The efficiency gained from the software enabled the firm to secure new commercial accounts and complete 40 percent more total deliveries during the year than in the previous year.

Cevap

The apparent discrepancy is resolved by the option explaining that the efficiency gained enabled the firm to complete 40 percent more total deliveries, increasing total fuel consumption despite lower fuel usage per trip.
The correct answer resolves the discrepancy by introducing a third variable: total delivery volume. Total fuel expenditure equals fuel per trip multiplied by total trips. If the fuel per delivery drops by 15 percent but the total number of deliveries increases by 40 percent, overall fuel consumption and expenditure will increase despite the improved per-trip efficiency.

Adım Adım Çözüm

1
Identify the two paradox premises.
Premise 1: Average fuel used per delivery decreased by 15%. Premise 2: Total annual fuel expenditure for the fleet increased by over 10% (with stable fuel prices).
Resolving a paradox requires finding a missing factor that allows both premises to be true simultaneously.
2
Analyze the mathematical relationship between rate and total volume.
Total Fuel Used = (Fuel Consumed per Delivery) × (Total Number of Deliveries).
If fuel per delivery falls, total fuel can only rise if the total number of deliveries increases significantly.
3
Evaluate the options for a factor that expands total volume sufficiently.
A 40% increase in total deliveries accounts for a higher total fuel consumption even when each delivery uses 15% less fuel.
This accounts for both facts without contradicting either premise.

Anahtar Kavram

Rate versus Total Volume Discrepancy
Soru 7Soru →

An urban planning committee observed that metropolitan neighborhoods with a high density of public community gardens reported significantly lower rates of stress-related cardiovascular conditions among residents than did neighborhoods with few or no community gardens. The committee concluded that exposure to community gardens directly reduces stress levels, thereby reducing the incidence of cardiovascular conditions among urban residents. Which of the following, if true, most seriously weakens the argument?

Cevabı ve açıklamayı göster

Cevap: The neighborhoods that established community gardens were also those selected for major municipal investments in extensive pedestrian walkways and cycling paths, which significantly increased regular physical exercise among residents.

Cevap

The argument is most seriously weakened by the statement pointing out that neighborhoods with community gardens also received major municipal investments in pedestrian walkways and cycling paths, which significantly increased regular physical exercise among residents.
The correct answer identifies an alternative cause (a confounding variable) for the lower incidence of cardiovascular conditions in those specific neighborhoods. If the neighborhoods with gardens also received major infrastructure improvements that led to increased physical exercise among residents, the improved health outcomes may be due to exercise rather than exposure to community gardens. This severely weakens the claim of a direct causal link between gardens and reduced cardiovascular conditions.

Adım Adım Çözüm

1
Identify the conclusion and premise
Premise: Neighborhoods with high garden density have lower rates of stress-related cardiovascular conditions. Conclusion: Exposure to community gardens directly reduces stress and cardiovascular conditions.
Understanding the precise causal claim (gardens cause lower cardiovascular illness) allows evaluation of logical vulnerabilities.
2
Identify the logical flaw
The argument assumes a correlation between community gardens and lower cardiovascular disease implies direct causation, ignoring potential confounding variables (third factors).
Causal arguments based on observational data are vulnerable to alternative factors that cause the observed effect.
3
Evaluate the answer choices for a confounding variable
The statement regarding new pedestrian walkways and cycling paths shows that increased physical exercise, rather than exposure to community gardens, could account for the reduced cardiovascular illness.
Providing a plausible third variable that accounts for the health outcome directly weakens the author's specific causal conclusion.

Anahtar Kavram

Causal Flaws and Confounding Variables
Soru 8Soru →

A major automotive assembly plant recently replaced its manual welding lines with automated robotic arms, resulting in a 30 percent decline in the total number of physical injuries reported by line workers over the following year. Paradoxically, during the exact same period, the average number of workdays lost per worker due to job-related injuries increased by nearly 40 percent, even though safety reporting standards, total workforce size, and overall operating hours remained unchanged.

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

Cevabı ve açıklamayı göster

Cevap: The installation of automated welding equipment allowed the plant to reassign many line workers to heavy-equipment assembly, where injuries occur less frequently but are substantially more severe.

Cevap

The apparent paradox is resolved by the statement that line workers were reassigned to heavy-equipment assembly, where injuries occur less frequently but are substantially more severe.
The correct resolution identifies a shift in worker tasks that simultaneously lowers overall injury frequency while increasing average injury severity. Reassigning workers to heavy-equipment assembly explains why fewer total injuries occurred (accounting for the 30 percent decline) and why the injuries that did occur resulted in significantly longer recovery periods (accounting for the 40 percent increase in lost workdays per worker).

Adım Adım Çözüm

1
Identify the two contradictory premises in the stimulus.
Premise 1: Total physical injuries reported by line workers dropped by 30%. Premise 2: Average workdays lost per worker due to injuries increased by nearly 40%.
Resolving a paradox requires identifying both conflicting facts that must be reconciled simultaneously.
2
Determine the necessary condition for a correct resolution.
The correct option must explain how injury frequency can decrease while injury severity (measured in lost workdays) increases.
A valid resolution cannot deny either premise; it must supply a third factor that connects lower frequency with higher average duration per injury.
3
Evaluate the choices against both premises.
Reassigning workers to heavy-equipment assembly accounts for fewer total injuries (lowering overall count) and greater injury severity (raising lost workdays per worker).
This subgroup composition shift accounts for both premises at the same time.

Anahtar Kavram

Resolving Paradoxes and Discrepancies
Tahmini Süre:2m 0s
Soru 9Soru →

An executive at an online retail company stated: 'To reverse our recent increase in shopping cart abandonment rates, we must either eliminate standard delivery charges for all orders or offer free return shipping. Because offering free return shipping on all orders would create unsustainable logistics costs, we must eliminate standard delivery charges.'

Statement: The executive's argument relies on a false dilemma fallacy by taking for granted that eliminating standard delivery charges and offering free return shipping are the only two viable strategies for reducing shopping cart abandonment.

Cevabı ve açıklamayı göster

Cevap: True

Cevap

The statement is True.
The statement is correct because the executive's reasoning exhibits a classic false dilemma flaw: it assumes that only two possible actions exist to resolve shopping cart abandonment, overlooking reasonable middle-ground or alternative approaches.

Adım Adım Çözüm

1
Analyze the structure of the argument in the passage.
The author presents two options ('either eliminate standard delivery charges... or offer free return shipping') and rules out one option based on financial cost, concluding that the remaining option must be implemented.
Understanding the premise-to-conclusion structure identifies how the argument limits potential solutions.
2
Identify the unstated assumption or logical flaw.
The author assumes without proof that no third option exists to address the problem of cart abandonment.
Artificially restricting possibilities to a binary choice without demonstrating that those choices are mutually exhaustive is a classic false dilemma.
3
Evaluate the accuracy of the provided statement.
The statement correctly describes the flaw as a false dilemma resulting from an unwarranted assumption about the exclusivity of the options.
Because the statement accurately diagnoses the argument's reasoning flaw, it is true.

Anahtar Kavram

False Dilemma and Unwarranted Assumptions
Soru 10Soru →

Dr. Aris: "To reduce municipal water waste during droughts, the city council should implement a tiered pricing structure that charges commercial users higher rates per gallon once their consumption exceeds baseline operational needs."

Council Member: "Dr. Aris's proposal is entirely unviable. If we completely prohibit commercial enterprises from using city water, local manufacturing will collapse and thousands of residents will lose their jobs."

Which of the following best describes the logical flaw in the council member's response?

Cevabı ve açıklamayı göster

Cevap: It distorts the original proposal into an extreme position that is easier to refute.

Cevap

The council member's argument distorts the original proposal into an extreme position that is easier to refute.
The correct answer accurately identifies the Straw Man flaw. Dr. Aris recommends higher pricing for consumption exceeding baseline operational needs. The council member responds by claiming Dr. Aris wants to 'completely prohibit' commercial water use. By attacking an extreme version of the plan that was never suggested, the council member commits a classic Straw Man fallacy.

Adım Adım Çözüm

1
Analyze Dr. Aris's position
Dr. Aris proposes a tiered pricing structure where commercial users pay higher rates only after exceeding baseline needs.
Establishing the precise scope of the initial proposal is necessary to evaluate counterarguments.
2
Analyze the Council Member's response
The council member claims Dr. Aris wants to 'completely prohibit commercial enterprises from using city water.'
Comparing the rebuttal to the premise reveals whether the speaker engaged with the actual proposal or distorted it.
3
Identify the logical flaw archetype
The council member reframes a moderate policy (higher rates for excess usage) as a total ban, which is a classic Straw Man flaw.
Exaggerating an opponent's position to make it easier to attack constitutes a straw man fallacy.

Anahtar Kavram

Straw Man Fallacy
Soru 11Soru →

A city recently increased the number of traffic police officers deployed downtown by 50 percent in an effort to catch speeding drivers. Surprisingly, during the six months following this deployment, the total number of speeding tickets issued downtown per month decreased significantly.

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

Cevabı ve açıklamayı göster

Cevap: Drivers aware of the increased police presence exercised greater caution and drove within the speed limit far more consistently.

Cevap

The apparent discrepancy is best resolved by the fact that drivers, aware of the increased police presence, exercised greater caution and drove within the speed limit far more consistently.
The statement about drivers exercising greater caution reconciles both facts: although there were 50 percent more police officers looking for speeding infractions, the drivers altered their behavior to obey speed limits, resulting in fewer total speeding violations and thus fewer tickets issued.

Adım Adım Çözüm

1
Identify the two contradictory facts in the stimulus.
Fact 1: Traffic police presence downtown increased by 50%. Fact 2: The monthly number of speeding tickets issued downtown decreased significantly.
Resolving a paradox requires finding an additional fact that allows both stated facts to be true simultaneously.
2
Evaluate how driver behavior affects the number of tickets issued.
Even with more officers looking for speeders, if drivers stop speeding, fewer tickets will be written.
A reduction in actual speeding incidents directly bridges the gap between increased enforcement effort and decreased ticket volume.

Anahtar Kavram

Resolving Paradoxes and Discrepancies
Soru 12Soru →

Following the introduction of an AI-driven automated diagnostic system at a major hospital network, the average triage evaluation time that human emergency room nurses spent per patient increased by 30 percent. Nevertheless, with the total number of emergency room nurses and overall patient volume remaining constant, the average waiting time for patients before receiving treatment decreased significantly across the hospital network.

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

Cevabı ve açıklamayı göster

Cevap: The automated system independently processed and cleared routine, minor cases without nurse involvement, leaving human nurses to handle only severe cases that naturally require longer evaluations.

Cevap

The discrepancy is resolved by the fact that the automated system independently processed and cleared routine, minor cases without nurse involvement, leaving human nurses to handle only severe cases that naturally require longer evaluations.
The correct answer reconciles both facts through a subgroup composition shift. When the AI system automatically handles routine minor cases, these patients bypass human triage nurses entirely, significantly shortening the overall patient queue and reducing wait times. Concurrently, human nurses are left evaluating only the severe, complex cases, which naturally take longer to assess. Thus, the average evaluation time per patient for human nurses rises even as overall patient waiting times fall.

Adım Adım Çözüm

1
Identify the two apparently contradictory facts in the passage.
Fact 1: Average triage time per patient spent by human nurses increased by 30%. Fact 2: Total nurses and patient volume remained constant, yet average pre-treatment patient wait times decreased significantly.
Resolving a paradox requires finding an explanation that allows both facts to be true simultaneously.
2
Analyze the mathematical and logical relationship between average time per unit and total pool composition.
If the automated system removes a large volume of fast, routine cases from the human queue, the denominator of human-evaluated patients shrinks, consisting now only of complex cases.
A shift in subgroup composition (a weighted average effect) can cause the average time spent on remaining human cases to rise while overall patient throughput speeds up.
3
Evaluate the choices to find the one that addresses both the increase in per-patient nurse time and the decrease in overall wait times.
The option stating that minor cases were handled entirely by the automated system reconciles both phenomena perfectly without contradicting any premise.
By filtering out minor cases, human queues shrink (reducing wait times), while the average time per patient for nurses increases because they only evaluate complex cases.

Anahtar Kavram

Resolving Paradoxes: Subgroup Composition Shift (Weighted Average Paradox)
Tahmini Süre:2m 0s
Soru 13Soru →

A regional electric utility company launched a program offering residential customers subsidized smart thermostats designed to lower household electricity usage during peak demand hours. Over the three years following the program's rollout, total peak-period electricity demand on the regional grid increased by 12 percent, even though more than 80 percent of households in the region installed the smart thermostats and each participating household successfully reduced its peak-period power consumption by an average of 15 percent.

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

Cevabı ve açıklamayı göster

Cevap: During the three-year period, rapid commercial development led to the construction of several large data centers in the region whose combined peak-period power consumption far exceeded the energy savings achieved by all participating households.

Cevap

During the three-year period, rapid commercial development led to the construction of several large data centers in the region whose combined peak-period power consumption far exceeded the energy savings achieved by all participating households.
The correct answer successfully resolves the paradox by demonstrating that residential consumption is only one component of total grid demand. If large-scale commercial entities like data centers entered the region and consumed power during peak hours in quantities that surpassed the residential savings, overall grid demand would increase despite widespread household efficiency gains.

Adım Adım Çözüm

1
Identify the two conflicting facts presented in the passage.
Fact 1: Over 80% of regional households installed smart thermostats and reduced their individual peak power use by 15%. Fact 2: Total regional grid demand during peak hours increased by 12%.
Resolving a discrepancy requires clearly isolating the two facts that appear contradictory.
2
Determine what information is needed to reconcile both facts.
A valid resolution must explain how total grid demand can rise even when residential demand drops significantly.
The correct answer must account for both facts simultaneously without denying either premise.
3
Evaluate the option introducing commercial data center expansion.
If non-residential peak electricity demand grew substantially due to new high-consumption data centers, total grid demand could increase by 12% despite household savings.
This provides a logical third factor that accounts for the net increase across the entire grid while preserving the fact that households saved energy.

Anahtar Kavram

Resolving Paradoxes: Accounting for Total Volume vs. Subgroup Shifts and Confounding Variables
Soru 14Soru →

In an effort to lower fleet fuel costs and carbon emissions, a commercial beverage distributor replaced its traditional single-use glass bottles with ultra-lightweight aluminum cans. Although the aluminum cans weighed significantly less per unit than the glass bottles, the company's total annual fleet fuel consumption increased by 14 percent during the year following the transition. This increase occurred despite the company delivering the exact same total volume of beverage product across identical distribution routes, with no changes to vehicle fuel efficiency, delivery schedules, or driver performance. Which of the following, if true, most helps to resolve the apparent discrepancy described above?

Cevabı ve açıklamayı göster

Cevap: Because aluminum cans structural integrity degrades when stacked under heavy weight, delivery trucks could not be loaded as high, requiring 25 percent more truck trips to transport the same volume of product.

Cevap

The apparent discrepancy is resolved by the option explaining that aluminum cans cannot be stacked as high without damage, forcing the company to run 25 percent more truck trips to move the same product volume.
The correct answer identifies a volumetric constraint that counteracts the weight advantage of aluminum cans. If lower structural strength prevents stacking cans to full truck capacity, more delivery trips are required to transport the same total product volume. Running 25 percent more truck trips directly explains why overall fleet fuel consumption increased by 14 percent despite each individual load being lighter.

Adım Adım Çözüm

1
Identify the core facts forming the paradox.
Fact 1: Aluminum cans weigh significantly less per unit than glass bottles. Fact 2: Fleet fuel consumption increased by 14 percent while transporting the exact same product volume over identical routes.
Resolving a discrepancy requires clearly isolating the two seemingly contradictory facts.
2
Evaluate the underlying assumption.
The implicit assumption is that lighter cargo weight directly reduces total transport fuel usage per shipment volume.
Fuel consumption depends not only on weight per unit, but also on the total number of vehicle trips required.
3
Assess how additional constraints impact total vehicle trips.
If structural limitations prevent high vertical stacking, cargo space per truck is underutilized. Consequently, more total truck trips are needed, raising overall fuel usage despite lower total weight per trip.
A valid resolution must account for both facts simultaneously without denying either premise.

Anahtar Kavram

Volume vs. Weight Transport Constraints in Discrepancy Resolution
Tahmini Süre:2m 0s
Soru 15Soru →

Match each argument excerpt from a debate on public policy and industry regulation with the logical flaw archetype (Straw Man distortion or Ad Hominem attack) it primarily exhibits.

Soldaki öğeye tıklayın, sonra eşleşen sağdaki öğeye tıklayın

Öğeler

Representative Vance suggests increasing the municipal library's operating budget by 5%. However, if we bankrupt our city by spending all public revenue on books, emergency services will fail. Thus, Vance's proposal must be rejected.
Dr. Aris argues that carbon emissions tax credits encourage green innovation. We should ignore her research because she receives grant funding from an alternative energy lobbying group and stands to benefit financially.
The chief technology officer proposed phasing out legacy database systems over three years. Critics responded that abandoning all digital infrastructure overnight would cause catastrophic data loss, proving the CTO's plan is unworkable.
The economist's empirical analysis demonstrates that tariffs will raise consumer prices. But given that he was previously dismissed from a government advisory panel for personal misconduct, his economic models cannot be trusted.

Eşleşmeler

Cevabı ve açıklamayı göster

Cevap

The budget argument matches the Straw Man flaw of extreme exaggeration; the carbon credit argument matches the Ad Hominem flaw of attacking financial motives; the technology plan argument matches the Straw Man flaw of misrepresenting a gradual plan as immediate action; and the tariff analysis argument matches the Ad Hominem flaw of targeting past personal misconduct.
Each excerpt is correctly paired based on whether the counterargument reframes the proposal itself or attacks the individual presenting it. The library budget and CTO proposals both distort the scope or timeline of the original claims to create easily falsified caricatures (Straw Man). Conversely, the carbon credit and tariff arguments dismiss empirical claims by targeting the researchers' financial affiliations and past conduct (Ad Hominem).

Adım Adım Çözüm

1
Analyze each excerpt to determine whether the counterargument attacks the content of the claim or the person making it.
Excerpts regarding the municipal library budget and the CTO proposal focus on altering the claim itself, whereas excerpts regarding carbon credits and tariffs focus on the person making the claim.
Straw Man fallacies misrepresent or distort the opponent's actual argument, while Ad Hominem fallacies attack the opponent's character, motive, or background.
2
Differentiate between the specific mechanisms of distortion in the Straw Man excerpts.
The library excerpt exaggerates a 5% increase into taking all public funds. The CTO excerpt converts a 3-year phased implementation into an immediate overnight action.
Matching requires identifying the precise subtype of distortion used in each premise.
3
Differentiate between the specific forms of personal attack in the Ad Hominem excerpts.
The carbon credit argument focuses on research grants and financial self-interest (motive attack). The tariff argument focuses on prior dismissal for personal misconduct (character/history attack).
Ad Hominem arguments vary between circumstantial/motive attacks and abusive/character attacks.

Anahtar Kavram

Identifying critical reasoning flaws: Straw Man distorts an opposing position to make it easier to defeat, while Ad Hominem attacks the speaker's background, motives, or character instead of evaluating the logical argument.
Soru 16Soru →

A municipality announced that to avoid a projected budget deficit next fiscal year, it must either raise property taxes by 15 percent or cut funding for public parks by half. The city treasurer concluded that because raising property taxes by 15 percent would be deeply unpopular with residents, the city has no choice but to reduce the parks budget by half.

Which of the following best describes a flaw in the city treasurer's reasoning?

Cevabı ve açıklamayı göster

Cevap: It falsely assumes that raising property taxes and cutting park funding are the only available methods to avoid a budget deficit.

Cevap

The argument falsely assumes that raising property taxes and cutting park funding are the only available methods to avoid a budget deficit.
The treasurer's argument presents a false dilemma by treating property tax hikes and park budget cuts as the only two conceivable solutions to the budget deficit. In reality, the city might reduce spending in other departments, seek alternative revenues, or utilize financial reserves. Assuming without justification that only these two options exist constitutes a classic false choice vulnerability.

Adım Adım Çözüm

1
Analyze the argument structure
Premise 1: To avoid a deficit, the city must either raise property taxes by 15% or cut park funding by 50%. Premise 2: Raising property taxes is deeply unpopular. Conclusion: The city must reduce the parks budget.
Identifying premises and conclusion isolates the logical jump.
2
Identify unstated assumptions and logical gaps
The argument presents two options as exhaustive (an 'either/or' scenario) without justification, ignoring other potential ways to balance the budget.
Presenting only two options when other middle-ground or alternative choices exist is a false dilemma flaw.
3
Select the choice matching the identified flaw
The statement pointing out that tax hikes and park cuts are taken as the only available options correctly describes this false dilemma.
It directly highlights the unstated false dilemma assumption.

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False Dilemma Fallacy
Soru 17Soru →

Consider the following argument:
'Every component manufactured for the prototype aircraft underwent rigorous stress testing and demonstrated exceptional structural resilience under heavy aerodynamic loads. Therefore, the assembled prototype aircraft as a whole will exhibit exceptional structural resilience under identical aerodynamic loads.'

Statement: The argument commits an Error of Composition by assuming that an attribute of each individual component necessarily applies to the entire assembled structure.

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Cevap: True

Cevap

True. The argument commits an Error of Composition by transferring a characteristic of individual components to the assembled aircraft as a whole.
The statement correctly classifies the logical flaw. The argument bases its conclusion about the complete aircraft solely on data regarding its isolated subcomponents, failing to account for vulnerabilities created during assembly and system integration.

Adım Adım Çözüm

1
Identify the premises and conclusion of the argument.
Premise: Each individual component of the aircraft demonstrated structural resilience. Conclusion: The assembled aircraft as a whole will demonstrate structural resilience.
Separating the evidence from the final claim clarifies the direction of the logical inference.
2
Analyze the direction of the part-to-whole inference.
The reasoning moves from attributes of the individual parts to an attribute of the whole system.
Determining whether the argument moves from part-to-whole or whole-to-part isolates the potential fallacy.
3
Evaluate whether the property is necessarily compositional.
Systemic structural resilience depends on joints, fasteners, and stress distribution between parts, not merely part-level resilience; therefore, the part-to-whole transition is invalid.
Identifying that system-level behavior differs from part-level properties confirms the presence of an Error of Composition.

Anahtar Kavram

Error of Composition
Soru 18Soru →

A municipal water utility recently deployed high-precision acoustic sensors across its underground pipe network to identify micro-leaks early. Over the following year, repair crews successfully located and sealed 45 percent more micro-leaks than in any previous year. Paradoxically, despite these prompt repairs, the total volume of treated water lost throughout the municipal distribution network increased by 15 percent over the same period. Which of the following, if true, most helps to resolve the apparent paradox described above?

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Cevap: Operating the acoustic monitoring system required raising hydraulic pressure in the main distribution trunklines, which drastically increased the rate of water escaping from undetected major structural ruptures elsewhere in the system.

Cevap

The statement explaining that operating the acoustic monitoring system required raising hydraulic pressure in the main distribution trunklines, thereby increasing the flow rate of undetected major structural ruptures, resolves the paradox.
The correct answer reconciles both facts by introducing a operational consequence of the technology. Raising system hydraulic pressure caused undetected high-volume leaks to spill significantly more water, overshadowing the water saved by fixing micro-leaks.

Adım Adım Çözüm

1
Identify the two apparently contradictory facts presented in the passage.
Fact 1: 45 percent more micro-leaks were located and sealed. Fact 2: Total volume of water lost in the network increased by 15 percent.
Resolving a paradox requires finding a piece of new information that allows both facts to be true simultaneously without denying either premise.
2
Evaluate the causal interaction introduced by each answer choice.
Increasing hydraulic pressure across the network to run the sensors creates a side effect: major undetected leaks lose water at a much faster rate, outweighing the savings from repaired micro-leaks.
This accounts for both the successful repair of micro-leaks and the overall increase in total volume lost.

Anahtar Kavram

Resolving Paradoxes through Confounding Side Effects and Volume Discrepancies
Soru 19Soru →

A municipality installed bright LED street lighting along main thoroughfares last year. Over the same period, night-time traffic accidents on those thoroughfares decreased by 15 percent. The mayor concluded that the improved visibility from the new street lights directly caused the reduction in night-time traffic accidents. Which of the following, if true, most seriously weakens the mayor's argument?

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Cevap: During the same period, the municipality significantly increased police speed-enforcement patrols on those thoroughfares, resulting in lower driving speeds.

Cevap

The mayor's argument is most seriously weakened by the statement that the municipality significantly increased police speed-enforcement patrols on those thoroughfares during the same period, resulting in lower driving speeds.
The conclusion asserts a direct causal link between enhanced street lighting and a reduction in night-time accidents. The correct response introduces a confounding variable—increased police speed-enforcement patrols during the exact same timeframe. This alternate factor provides a plausible competing explanation for why driving speeds dropped and accidents decreased, directly undermining the mayor's assertion that the lights were the sole cause.

Adım Adım Çözüm

1
Identify the conclusion and premises in the argument.
Premise: LED lights were installed, and night-time accidents fell by 15%. Conclusion: Improved visibility from the lights directly caused the decrease in accidents.
Isolating the causal assertion allows us to target the logical gap between the correlation and the conclusion.
2
Identify the causal flaw.
The argument assumes correlation implies direct causation without considering third-variable confounders.
Causal claims on the GMAT are vulnerable to alternate explanations that occurred during the same timeframe.
3
Evaluate the options for a confounding variable.
The choice introducing increased police patrols provides an alternate cause for the reduced accident rate, undermining the claim that lights were responsible.
Demonstrating that another factor could account for the effect weakens the author's primary causal claim.

Anahtar Kavram

Causal Flaws and Confounding Variables
Soru 20Soru →

Executive Director of Apex Tech: Every individual software module in our new operating system was developed by top security specialists and passed its independent unit test with zero syntax errors. Therefore, when all forty modules are combined into a single integrated platform, the entire operating system is guaranteed to run without performance bottlenecks or unexpected crashes.

Which of the following best describes the logical flaw in the Executive Director's argument?

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Cevap: It presumes without justification that a property held by each individual component of a system must also belong to the system as a whole.

Cevap

The correct answer identifies the fallacy of composition: assuming that because every constituent module functions without error in isolation, the integrated operating system as a whole will function flawlessly.
The argument assumes that because each individual software module has no syntax errors and passes independent unit testing, the entire combined system will function flawlessly. This is a classic fallacy of composition: inferring that a system as a whole must possess a characteristic simply because each of its individual constituent parts possesses that characteristic. In software engineering and complex systems, individual components can interact in unpredictable ways, creating system-level bottlenecks or crashes even if each component is bug-free in isolation.

Adım Adım Çözüm

1
Analyze the premise and conclusion structure of the argument.
Premise: Each individual module has zero syntax errors and passed independent testing. Conclusion: The integrated system composed of all modules will run without crashes.
Identifying the premises and conclusion clarifies the logical leap taken by the author.
2
Evaluate the logical relationship between the parts (modules) and the whole (operating system).
System integration often introduces complex inter-module interactions, memory leaks, and interface conflicts that do not exist within isolated modules.
Attributes of individual components do not automatically transfer to the combined whole.
3
Match the identified reasoning gap to the correct flaw description.
The argument illustrates an Error of Composition (inferring whole-system properties from part-level properties).
Selecting the option that accurately describes inferring whole-system properties from part-level properties correctly points out the flaw.

Anahtar Kavram

Errors of Composition and Division
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