Examkin

Argument Evaluation

289 soru

Tüm türler289Çoktan seçmeli150Çoklu seçim23Doğru / Yanlış57Eşleştirme59
Soru 161Soru →

Political Theorist: Any society aiming to establish a truly egalitarian economic framework is obligated to prioritize the decentralization of its political institutions. When political authority is heavily concentrated, bureaucratic inertia inevitably stifles the implementation of innovative wealth-redistribution programs. Fortunately, the newly ratified constitution of the Republic of Montoria systematically dismantles its historically centralized governance structures. Therefore, by enacting this constitution, Montoria will successfully institute a truly egalitarian economic framework.

Which of the following most accurately describes a flaw in the political theorist's reasoning?

Cevabı ve açıklamayı göster

Cevap: The argument inappropriately infers that fulfilling a necessary requirement for a particular social condition inherently guarantees the eventual emergence of that condition.

Cevap

The argument inappropriately infers that fulfilling a necessary requirement for a particular social condition inherently guarantees the eventual emergence of that condition.
The correct answer accurately identifies that the argument commits a formal logic error by confusing a necessary condition with a sufficient condition. The first premise establishes that political decentralization is a prerequisite (necessary condition) for an egalitarian framework. The argument then notes that Montoria has achieved this decentralization. However, it concludes that Montoria will definitely achieve the egalitarian framework. This assumes that because a necessary hurdle has been cleared, the final goal is guaranteed, ignoring other potential requirements for an egalitarian society.

Adım Adım Çözüm

1
Analyze the conditional logic established in the first premise.
An egalitarian economic framework requires the decentralization of political institutions. Logically: Egalitarian Framework -> Decentralization.
To establish the baseline logical rules the argument must follow.
2
Identify the factual premise regarding the specific case of Montoria.
Montoria is dismantling its centralized governance, meaning it is achieving the necessary condition (Decentralization).
To see how the argument applies the general rules to a specific scenario.
3
Evaluate the argument's final conclusion.
The author concludes that because Montoria achieved Decentralization, it will successfully establish an Egalitarian Framework. Logically: Decentralization -> Egalitarian Framework.
To compare the argument's logical deduction against the established conditional rules.
4
Compare the premise structure to the conclusion to identify the logical leap.
The argument treats the necessary condition (Decentralization) as if it were a sufficient condition to guarantee the outcome (Egalitarian Framework).
This identifies the specific formal fallacy (Affirming the Consequent) committed by the author.

Anahtar Kavram

Necessary vs. Sufficient Condition Flaws
Soru 162Soru →

Paleontologist: The recently unearthed fossil of *Aerovenator*, a small theropod dinosaur, clearly shows impressions of asymmetrical feathers surrounding its forelimbs. In all modern bird species, asymmetrical feathers are essential for generating the aerodynamic lift required for sustained, powered flight. Therefore, unlike its close evolutionary relatives which were only capable of gliding, *Aerovenator* possessed the ability to engage in sustained, powered flight.

Which of the following are assumptions on which the paleontologist's argument depends? (Select all that apply.)

Geçerli olan tümünü seçin

Cevabı ve açıklamayı göster

Cevap: *Aerovenator* possessed the muscular and skeletal anatomy necessary to utilize its forelimbs to generate aerodynamic lift.; The asymmetrical feather impressions preserved alongside the *Aerovenator* fossil did not originate from a different, flying species that was fossilized at the same site.

Cevap

The correct answers are the statements that *Aerovenator* possessed the necessary muscular and skeletal anatomy to utilize its forelimbs for lift, and that the asymmetrical feather impressions genuinely belong to the *Aerovenator* fossil rather than another species.
The correct statements represent necessary assumptions because applying the logical Negation Test to them destroys the paleontologist's argument. The argument leaps from the presence of asymmetrical feathers directly to the capability of powered flight. For this leap to be valid, the dinosaur must have possessed all other physiological prerequisites for flight (such as suitable musculature), and the fossil evidence itself must be untainted (the feathers must actually belong to the specimen in question).

Adım Adım Çözüm

1
Identify the conclusion and the premises.
Conclusion: *Aerovenator* was capable of sustained, powered flight. Premises: The fossil has asymmetrical feather impressions; modern birds require asymmetrical feathers for powered flight.
Deconstructing the argument is the first critical step to evaluating the logical gap between the evidence and the claim.
2
Identify potential gaps or vulnerabilities in the reasoning.
The argument assumes that having flight feathers is the only requirement for flight, ignoring other physiological needs. It also assumes the physical evidence definitively belongs to this specific dinosaur.
Anticipating logical gaps helps in identifying both 'supporter' and 'defender' assumptions.
3
Apply the Negation Test to candidate answers.
Negating the correct options destroys the conclusion. Negating 'It possessed the necessary anatomy' means it couldn't flap effectively. Negating 'The feathers didn't belong to another species' means there is no evidence *Aerovenator* had the feathers at all.
The Negation Test is the definitive method for confirming whether an assumption is strictly logically necessary.

Anahtar Kavram

Necessary Assumption and the Negation Test
Tahmini Süre:1m 30s
Soru 163Soru →

Match each logical argument (left) with the specific piece of evidence (right) that most powerfully strengthens its conclusion by resolving its core structural vulnerability.

Soldaki öğeye tıklayın, sonra eşleşen sağdaki öğeye tıklayın

Öğeler

An analysis revealed that companies allowing remote work saw a 15% increase in output per employee. Thus, working from home eliminates office distractions and directly boosts individual efficiency.
Immediately after the government lowered the capital gains tax, foreign investment in domestic tech startups doubled. Therefore, the tax cut successfully incentivized international investors.
Because fragments of a rare meteor were found alongside fossilized dinosaur bones in the crater, the meteor impact must have been the direct cause of the sudden extinction in this region.
To combat urban heat islands, our city should mandate white reflective roofs, just as the city of Solaris did ten years ago to dramatically lower its ambient temperatures.

Eşleşmeler

Cevabı ve açıklamayı göster

Cevap

The correct pairings are: Remote work (Left 1) with Time-tracking logs (Right 2); Tax cut (Left 2) with Global downturn (Right 3); Meteor impact (Left 3) with Radiometric dating (Right 4); and Urban heat roofs (Left 4) with Meteorological data (Right 1).
Each correct pairing directly addresses the unstated assumption in the argument. Left 1 is strengthened by Right 2 because it eliminates the alternative that productivity rose due to longer hours. Left 2 is strengthened by Right 3 because it eliminates the alternative of a global market boom. Left 3 is strengthened by Right 4 by proving the timeline supports causality. Left 4 is strengthened by Right 1 because it validates the analogy between the two cities.

Adım Adım Çözüm

1
Analyze each argument to identify its conclusion and its underlying vulnerability (e.g., alternative causes, weak analogies).
Identified four distinct gaps: alternate cause for productivity, alternate cause for investment, temporal/causal gap in extinction, and relevance gap in the city analogy.
Understanding the specific flaw in an argument is necessary before one can identify the evidence that repairs it.
2
Evaluate the available evidence statements on the right to see which logically seals a corresponding gap.
Matched each evidence statement to an argument based on how it defends against a vulnerability (e.g., ruling out increased work hours to support efficiency).
Strengthening an argument often involves eliminating alternative explanations or confirming the validity of a comparison.

Anahtar Kavram

Identifying and resolving structural vulnerabilities in causal and analogical reasoning.
Soru 164Soru →

Match each logical argument with the specific piece of additional evidence that would most strongly support its conclusion by addressing its underlying logical vulnerability.

Soldaki öğeye tıklayın, sonra eşleşen sağdaki öğeye tıklayın

Öğeler

Office workers using the new 'AeroType' ergonomic keyboard reported significantly less wrist fatigue over a one-month period than workers using standard keyboards. Thus, the AeroType keyboard effectively reduces typing strain.
In a recent poll conducted entirely within the downtown financial district, 75% of respondents supported the proposed city-wide transit tax. Therefore, the tax is likely to have broad support among all registered city voters.
The experimental 'Sun-Glow' tomato variety yielded 40% more fruit than traditional varieties during controlled greenhouse tests. Consequently, local farmers adopting this variety will see massive increases in their actual outdoor harvests.
Accounting firm Alpha saw a 20% increase in employee output after switching to a fully remote work model. Therefore, law firm Beta will also experience a significant productivity boost if it adopts a fully remote model.

Eşleşmeler

Cevabı ve açıklamayı göster

Cevap

Argument 1 matches with the evidence regarding work hours and breaks. Argument 2 matches with the demographic evidence. Argument 3 matches with the greenhouse calibration evidence. Argument 4 matches with the workflow comparison evidence.
Each correct pairing matches an argument with the specific premise that resolves its unique logical vulnerability. Argument 1 requires ruling out alternative causes for reduced fatigue. Argument 2 requires proving the survey sample is representative. Argument 3 requires demonstrating that experimental conditions apply to the real world. Argument 4 requires establishing that the two compared firms are relevantly similar.

Adım Adım Çözüm

1
Analyze Argument 1 to identify the logical gap.
The argument assumes a causal relationship between the keyboard and reduced fatigue, ignoring potential differences between the two groups of workers.
Finding an alternate cause that is eliminated by the evidence is the standard way to strengthen a causal claim.
2
Analyze Argument 2 to identify the logical gap.
The argument relies on a survey of a specific neighborhood to make a claim about an entire city.
Strengthening a survey-based argument requires demonstrating that the sample is adequately representative of the whole.
3
Analyze Argument 3 to identify the logical gap.
The argument assumes that success in a controlled greenhouse environment will seamlessly translate to outdoor farming.
Strengthening this requires evidence showing the two environments are functionally identical regarding the crop's needs.
4
Analyze Argument 4 to identify the logical gap.
The argument assumes that because a strategy worked for an accounting firm, it will work for a law firm.
Strengthening an argument by analogy requires proving that the two subjects share critical similarities relevant to the conclusion.

Anahtar Kavram

Strengthening Arguments by Identifying and Resolving Logical Gaps
Soru 165Soru →

Music historian: A newly discovered manuscript of symphonies attributed to the 18th-century composer Antonietta contains complex harmonic progressions previously thought to have been invented decades later. Chemical analysis definitively dates both the paper and the ink to the 1720s, during Antonietta's active years. Therefore, Antonietta pioneered these advanced harmonic progressions.

The argument above depends on the assumption that Antonietta did not simply transcribe the innovative compositions of an uncredited contemporary.

Cevabı ve açıklamayı göster

Cevap: True

Cevap

True. The statement identifies a necessary assumption required to logically link the physical existence of the manuscript to the claim that Antonietta originated the musical ideas.
The statement accurately identifies a necessary assumption. The argument jumps from the existence of a 1720s manuscript bearing Antonietta's name to the conclusion that she conceptually originated the music. For this conclusion to survive, one must assume she was the true creator. Using the Negation Test, if she were merely transcribing another composer's original work, she could not be considered the pioneer, and the argument collapses entirely. Thus, the assumption is necessary.

Adım Adım Çözüm

1
Identify the argument's premises and main conclusion.
Premise: A 1720s manuscript attributed to Antonietta contains advanced harmonies. Conclusion: Antonietta pioneered these harmonies.
Separating the factual evidence from the author's claim is the required first step to spot logical leaps.
2
Analyze the conceptual gap between the evidence and the conclusion.
The premises prove the manuscript is physically from the 1720s and has her name on it, but the conclusion claims she is the intellectual creator (pioneer) of the music.
Physical authorship of a document does not inherently guarantee originality of the concepts within it.
3
Apply the Negation Test to the proposed statement.
Negated statement: Antonietta DID simply transcribe the innovative compositions of an uncredited contemporary.
The Negation Test is the definitive logical method for verifying if an assumption is strictly necessary.
4
Evaluate the effect of the negated statement on the main conclusion.
If she merely copied another composer's work, the other composer was the pioneer. The conclusion is destroyed, proving the original statement is a necessary assumption.
An assumption is logically necessary if and only if its negation invalidates the argument.

Anahtar Kavram

Necessary Assumption (Defender) and the Negation Test
Tahmini Süre:1m 30s
Soru 166Soru →

Ornithologist: In the past few decades, populations of the crested scrub-jay living in urban areas have developed significantly shorter beaks than those living in surrounding rural woodlands. This morphological change is an evolutionary adaptation. Shorter beaks are better suited for scavenging human food scraps from flat surfaces, which are abundant in urban areas, whereas the longer beaks of rural jays are necessary for extracting insects from deep crevices in tree bark.

Which of the following statements, if true, strengthen the ornithologist's argument? (Select all that apply.)

Geçerli olan tümünü seçin

Cevabı ve açıklamayı göster

Cevap: Urban scrub-jays raised in captivity from hatching on a strict diet of tree-dwelling insects still develop shorter beaks than rural scrub-jays.; When presented with identical human food scraps on a flat surface, scrub-jays with shorter beaks consume the food significantly faster than those with longer beaks.

Cevap

The correct statements are the one demonstrating that captive urban jays retain short beaks regardless of diet, and the one confirming that shorter beaks provide a consumption speed advantage on flat surfaces.
The ornithologist argues that the shorter beaks in urban scrub-jays are an evolutionary adaptation specifically suited for scavenging human food scraps. To strengthen this causal claim, we must support the mechanism or rule out alternative explanations. The option involving jays raised in captivity strengthens the argument by ruling out environmental plasticity (e.g., that eating from flat surfaces simply wears down the beak), thereby supporting the claim that the change is genetic. The option comparing food consumption speeds directly validates the premise that shorter beaks provide a tangible mechanical advantage for scavenging on flat surfaces.

Adım Adım Çözüm

1
Identify the main conclusion and the supporting premises of the argument.
Conclusion: The shorter beaks of urban scrub-jays are an evolutionary adaptation for scavenging human food scraps. Premises: Urban jays have shorter beaks than rural jays; short beaks are better for flat surfaces; long beaks are needed for tree bark.
Understanding the core argument structure is required before evaluating how to strengthen its logic.
2
Analyze the logical gaps or vulnerabilities in the argument.
The argument assumes the change is genetic/evolutionary rather than a physical result of wear and tear (developmental plasticity). It also assumes the theoretical advantage of short beaks actually translates to a practical advantage in acquiring food.
Identifying weaknesses highlights exactly what kind of new information would shore up the argument's plausibility.
3
Evaluate the answer choices against the identified gaps.
The statement about captive-raised jays proves the trait is genetic, eliminating the alternative cause of physical wear. The statement about consumption speed proves the practical advantage, validating the proposed mechanism.
Correct answers in a strengthen question must directly address and bridge the logical gaps in the author's reasoning.

Anahtar Kavram

Strengthen - Ruling out Alternate Causes and Validating Causal Mechanisms
Tahmini Süre:2m 0s
Soru 167Soru →

Botanist: The rare Moonflower typically blooms only when exposed to a specific ultrasonic frequency produced by the wings of the Silver Moth. However, a thriving population of blooming Moonflowers was recently discovered on a remote island where Silver Moths are completely absent. Clearly, another species of insect on this island must produce this same ultrasonic frequency, thereby triggering the flowers to bloom.

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

Cevabı ve açıklamayı göster

Cevap: When grown from seed in a silent, controlled laboratory setting, Moonflowers from the remote island will not bloom unless exposed to the specific ultrasonic frequency.

Cevap

The option stating that Moonflowers from the island will not bloom in a silent laboratory unless exposed to the specific frequency.
The botanist concludes that another insect species on the island is producing the required ultrasonic frequency. This argument fundamentally relies on the assumption that the island Moonflowers still actually require this frequency to bloom. The correct answer eliminates the alternative explanation that the island population has simply evolved to bloom without any acoustic stimulation. By confirming that the frequency is still biologically necessary for these specific flowers, it strengthens the premise that the frequency must be physically present on the island, thereby bolstering the conclusion.

Adım Adım Çözüm

1
Identify the core components of the argument.
Premise: Moonflowers need a specific ultrasonic frequency to bloom, usually from Silver Moths. Premise: Blooming Moonflowers are on an island without Silver Moths. Conclusion: Another insect on the island produces the frequency.
Understanding the structural relationship between premises and conclusion is necessary to evaluate gaps.
2
Identify the logical gap or assumption made by the author.
The author assumes that the Moonflowers on the island still require the ultrasonic frequency to bloom, rather than having adapted to bloom without it.
Arguments often rely on unstated assumptions that, if false, would cause the argument to collapse.
3
Evaluate the answer choices to find one that supports this assumption or rules out an alternative explanation.
The correct answer demonstrates that the island Moonflowers still biologically require the frequency, ruling out the alternative that they evolved to no longer need it.
Eliminating a viable alternative explanation (that the plants changed) forces us to accept that the frequency is present, strengthening the claim that a new insect is providing it.

Anahtar Kavram

Ruling Out Alternative Explanations (Defender Assumption)
Tahmini Süre:1m 30s
Soru 168Soru →

Consider the following argument:

Architect: A building cannot be considered a modernist masterpiece unless it prioritizes functional utility over ornamentation and utilizes industrial materials like steel or glass. The new municipal library clearly utilizes industrial materials, featuring a striking glass facade supported by a steel frame. Furthermore, its interior layout was strictly dictated by the practical requirements of storing and accessing books.
Therefore, the new municipal library is a modernist masterpiece.

Statement: The assumption 'Any building whose interior layout is strictly dictated by practical requirements prioritizes functional utility over ornamentation' is sufficient to logically guarantee the architect's conclusion.

Cevabı ve açıklamayı göster

Cevap: False

Cevap

False
The correct answer is False because the original argument commits a flaw of conditional logic by treating necessary conditions as sufficient. While the proposed assumption successfully bridges a semantic gap to prove the library meets all necessary conditions, fulfilling necessary conditions is never logically sufficient to guarantee the conclusion.

Adım Adım Çözüm

1
Diagram the conditional logic in the first sentence.
Modernist Masterpiece (MM) -> Prioritizes Functional Utility (PFU) AND Utilizes Industrial Materials (UIM).
The phrase 'cannot be considered... unless' introduces necessary conditions that must be placed on the right side of the conditional arrow.
2
Identify the premises regarding the specific subject (the municipal library).
The library has UIM (glass and steel) and its layout was dictated by practical requirements.
To map the evidence provided against the established conditional rules.
3
Analyze the proposed assumption to see what it adds.
The assumption 'Dictated by practical requirements -> PFU' establishes that the library definitely possesses PFU.
We must evaluate how this new premise changes the argument's validity.
4
Evaluate if the combined premises logically guarantee the conclusion.
With the assumption, we know the library has both PFU and UIM. The conclusion asserts the library is an MM. However, MM -> (PFU AND UIM). Fulfilling the necessary conditions does not guarantee the sufficient condition (MM).
A sufficient assumption must make the conclusion 100% deductively valid. Affirming the consequent commits a formal flaw, so the assumption is insufficient.

Anahtar Kavram

Distinguishing between necessary and sufficient conditions in formal logic, and recognizing that bridging a semantic premise gap cannot repair an underlying structural flaw.

Alternatif Yöntem

You can quickly eliminate the proposed assumption by looking purely at the logical structure rather than the meaning of the words. The first premise establishes the structure: A -> (B and C). The conclusion asserts A. Since the premises only establish the right side of the conditional, no assumption that merely reinforces the right side can ever prove the left side (A). A sufficient assumption must explicitly state that (B and C) -> A.
Tahmini Süre:2m 0s
Soru 169Soru →

Consider the following argument:

Nutritionist: Many office workers consume heavily sweetened energy drinks to improve their focus during afternoon slumps. However, these drinks contain high levels of refined sugars, which lead to a rapid spike in blood glucose followed by a severe crash. This crash leaves workers feeling significantly more fatigued than they were before consuming the beverage. Therefore, drinking these energy drinks actually decreases a worker's overall productivity during the workday.

It is a necessary assumption of the nutritionist's argument that the initial improvement in focus from the energy drink does not result in a productivity gain that outweighs the productivity lost during the subsequent crash.

Cevabı ve açıklamayı göster

Cevap: True

Cevap

True. The statement correctly identifies an unstated premise strictly required for the argument's conclusion to hold.
The argument concludes that overall productivity decreases despite an initial improvement in focus. For a net decrease to occur, the negative impact of the crash must be greater than the positive impact of the initial focus. Therefore, the argument must assume that the initial gain does not outweigh the subsequent loss. Applying the Negation Test confirms this: if the initial gain DID outweigh the loss, overall productivity would increase, destroying the conclusion.

Adım Adım Çözüm

1
Identify the argument's main conclusion.
The conclusion is the final sentence: drinking energy drinks actually decreases a worker's overall productivity during the workday.
Understanding the main point is required to evaluate what assumptions are strictly necessary to support it.
2
Identify the premises and opposing factors provided in the stimulus.
The premises are: 1) the drinks cause an initial improvement in focus, and 2) the sugars cause a severe crash that leaves workers significantly more fatigued.
Isolating the evidence reveals the logical gap between the competing premises (a benefit vs. a drawback) and the definitive conclusion.
3
Apply the Negation Test to the provided statement.
The logically negated statement is: 'The initial improvement in focus DOES result in a productivity gain that outweighs the productivity lost during the subsequent crash.'
The Negation Test is the definitive method for confirming whether an assumption is strictly required by the argument.
4
Evaluate the effect of the negated statement on the argument's conclusion.
If the positive effects outweigh the negative effects, overall productivity would increase (or at least remain net positive), which completely destroys the conclusion that overall productivity decreases.
Since negating the statement invalidates the argument, the original statement is a necessary assumption.

Anahtar Kavram

Applying the Negation Test to identify necessary assumptions involving trade-offs and net outcomes.
Tahmini Süre:1m 30s
Soru 170Soru →

Materials Scientist: A new synthetic polymer, Elastium, is being adopted for manufacturing outdoor climbing ropes. Laboratory tests demonstrate that individual Elastium fibers are 30 percent more resistant to physical abrasion than the nylon fibers currently used in standard climbing ropes. Therefore, climbing ropes constructed entirely from Elastium will have a significantly longer safe-usage lifespan than current nylon climbing ropes.

Which of the following are assumptions on which the materials scientist's argument depends? (Select all that apply)

Geçerli olan tümünü seçin

Cevabı ve açıklamayı göster

Cevap: The increased abrasion resistance of individual Elastium fibers results in a corresponding increase in the abrasion resistance of ropes woven from those fibers.; Elastium ropes do not degrade from other environmental factors, such as ultraviolet exposure, much more rapidly than nylon ropes do.

Cevap

The correct options are the one stating that individual fiber resistance transfers to the woven rope, and the one stating Elastium does not degrade much more rapidly from other environmental factors.
The argument relies on two distinct assumptions. First, it assumes a part-to-whole relationship: that the superior abrasion resistance of individual Elastium fibers actually translates into superior abrasion resistance for the entire woven rope. If it does not, the conclusion fails. Second, it assumes that Elastium does not suffer from a separate, unstated vulnerability (such as rapid UV degradation) that would offset its superior abrasion resistance and shorten its overall safe-usage lifespan. Both of these unstated premises must be true for the conclusion to remain logically viable.

Adım Adım Çözüm

1
Identify the core argument components.
Premise: Elastium fibers are 30% more resistant to physical abrasion than nylon fibers. Conclusion: Elastium ropes will have a significantly longer safe-usage lifespan.
Isolating the premise and conclusion highlights the logical gaps that must be bridged or defended.
2
Identify gaps in the reasoning (Bridge gaps).
The argument jumps from the properties of 'individual fibers' to the properties of the 'completed rope'. It assumes the strength of the parts translates to the strength of the whole.
Necessary assumptions often bridge new terms or scope shifts between the premise and conclusion.
3
Identify potential vulnerabilities (Defender gaps).
The argument assumes that abrasion is the determining factor for lifespan and that Elastium doesn't have some other fatal flaw (like UV degradation) that would shorten its lifespan compared to nylon.
Arguments projecting a positive outcome must assume there are no unstated overriding negatives.
4
Apply the Negation Test to candidate answers.
Negating the part-to-whole transfer ruins the conclusion. Negating the defense against other degradation factors (meaning Elastium DOES degrade much faster from other things) ruins the conclusion.
A valid necessary assumption must invalidate the argument when it is rendered logically false.

Anahtar Kavram

Necessary Assumption
Soru 171Soru →

Recent excavations at the ancient city of Veridia have uncovered massive quantities of elaborate bronze weaponry. This cache was found concentrated entirely within a single ceremonial structure dating to the late period of the city's occupation. Because surviving historical texts indicate that Veridia underwent a significant cultural shift toward militarism during this era, archaeologists have concluded that the discovery of this weaponry proves Veridia must have maintained a massive, active standing army during its late period.

Which one of the following would be most useful to determine in order to evaluate the archaeologists' argument?

Cevabı ve açıklamayı göster

Cevap: Whether the bronze weaponry exhibits damage and wear patterns characteristic of use in actual combat

Cevap

The statement assessing whether the bronze weaponry exhibits damage and wear patterns characteristic of use in actual combat.
The correct answer isolates the central assumption of the argument. Applying the Variance Test: If the weapons do show combat wear (Yes), this supports the conclusion that they were actively used by a standing army. If the weapons do not show any wear (No), this heavily undermines the conclusion, suggesting the cache in the ceremonial structure was purely decorative or ritualistic.

Adım Adım Çözüm

1
Identify the core conclusion of the argument.
The archaeologists conclude that Veridia maintained a massive, active standing army during its late period.
Understanding the exact claim being made is necessary to evaluate its validity.
2
Identify the primary premise supporting the conclusion.
The premise is the discovery of massive quantities of elaborate bronze weaponry concentrated in a ceremonial structure.
Identifying the evidence helps pinpoint the logical gap between the premise and the conclusion.
3
Pinpoint the logical gap (flaw) in the argument.
The argument assumes that the mere presence of weaponry, especially in a ceremonial context, equates to active military use rather than purely symbolic or ritualistic purposes.
Finding the assumption allows us to determine what information is needed to test it.
4
Apply the Variance Test to the answer choices.
The correct answer must yield different outcomes that respectively strengthen and weaken the conclusion when answered with opposite extremes (e.g., Yes vs. No).
The Variance Test is the definitive method for verifying the correct answer in 'Evaluate the Argument' questions.

Anahtar Kavram

Applying the Variance Test to evaluate a core assumption.
Soru 172Soru →

City Council Member: A municipality will halt the rapid escalation of its residential property values only if it successfully enacts stringent zoning deregulation. Consequently, because the neighboring district of Oakhaven has just finalized the most aggressive zoning deregulation package in our state's history, we can be certain that Oakhaven's residential property values will halt their escalation in the near future.

Which one of the following most accurately describes a flaw in the council member's reasoning?

Cevabı ve açıklamayı göster

Cevap: presumes, without providing justification, that satisfying a prerequisite for a given outcome is enough to guarantee that outcome

Cevap

The argument concludes that fulfilling a necessary condition (zoning deregulation) is sufficient to ensure the outcome (halting property value escalation).
The council member's argument establishes that stringent zoning deregulation is a requirement ('only if') for halting the escalation of property values. However, the conclusion assumes that because Oakhaven met this requirement, success is absolutely certain. This flawed reasoning mistakenly treats a necessary prerequisite as a sufficient guarantee.

Adım Adım Çözüm

1
Analyze the conditional structure of the first premise.
The phrase 'only if' introduces a necessary condition: Halting escalation requires stringent zoning deregulation.
Identifying formal logic relationships is essential for spotting structural flaws.
2
Examine the application of the premise to the specific case of Oakhaven.
The argument observes that Oakhaven has satisfied the necessary condition by enacting aggressive zoning deregulation.
This establishes how the general rule is applied to the specific real-world scenario.
3
Evaluate the conclusion drawn from the premises.
The argument concludes that Oakhaven is guaranteed to achieve the outcome (halting escalation) simply because it met the requirement.
Comparing the premises to the conclusion reveals the logical gap in the reasoning.
4
Identify the logical error.
The reasoning treats a condition that is required for an outcome as if it were a condition that guarantees the outcome.
This confirms the presence of a Necessary vs. Sufficient condition flaw.

Anahtar Kavram

Distinguishing between necessary conditions (requirements) and sufficient conditions (guarantees)
Soru 173Soru →

Marine engineer: A newly developed hull coating, AquaShield, prevents barnacle and algae accumulation significantly more effectively than the current industry standard. Since biological accumulation on a ship's hull increases hydrodynamic drag, ships must burn more fuel to maintain their scheduled speeds. Therefore, shipping companies that adopt AquaShield for their fleets will inevitably see a reduction in their overall operational expenses.

Which one of the following is an assumption on which the marine engineer's argument depends?

Cevabı ve açıklamayı göster

Cevap: The costs associated with purchasing and applying AquaShield do not completely offset the financial savings gained from reduced fuel consumption.

Cevap

The assumption that the costs of purchasing and applying the new coating do not completely offset the savings from reduced fuel consumption.
The argument concludes that overall operational expenses will be reduced based on the premise that one specific expense (fuel) will decrease. For this conclusion to hold true, it must be assumed that the introduction of the new product does not bring with it new costs that wipe out the fuel savings. If the costs of AquaShield were to completely offset the fuel savings, overall expenses would stay the same or rise, destroying the argument.

Adım Adım Çözüm

1
Identify the main conclusion of the argument.
The conclusion is that adopting AquaShield will reduce overall operational expenses.
Understanding the precise scope of the conclusion is required to find what must be true to support it.
2
Identify the premises supporting the conclusion.
Premise 1: AquaShield prevents accumulation better than the standard. Premise 2: Less accumulation means less drag, which means less fuel burned.
We must map how the author gets from the evidence to the conclusion to spot the gap.
3
Spot the logical gap (term shift) between the premises and the conclusion.
The premises discuss a reduction in a specific cost (fuel). The conclusion jumps to a reduction in 'overall operational expenses'.
A necessary assumption must bridge the gap between a specific component and a total aggregate.
4
Apply the Negation Test to the correct candidate.
If the costs of AquaShield DO completely offset the fuel savings, then overall expenses will not decrease. The conclusion is destroyed.
The Negation Test definitively proves whether an assumption is strictly necessary.

Anahtar Kavram

Identifying Necessary Assumptions (Bridging the gap between specific savings and overall costs)
Tahmini Süre:1m 30s
Soru 174Soru →

Read the following stimulus carefully:

Economist: A currency cannot be considered truly stable unless it is backed by a tangible commodity, such as gold or silver. Historical records indicate that the currency of the ancient Empire of Valoria was fully backed by vast reserves of silver. Furthermore, Valoria's economy experienced nearly three centuries of uninterrupted growth and high trade volume. Therefore, we can confidently conclude that the Valorian currency was truly stable.

Determine whether the following description of the argument's flaw is true or false: The argument is vulnerable to criticism because it concludes that a condition is necessary for a currency to be considered truly stable on the grounds that this condition is sufficient to establish such stability.

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Cevap: False

Cevap

False
The correct answer is False because the statement describes the exact reverse of the actual logical flaw in the stimulus. The stimulus establishes that commodity backing is necessary for stability ('cannot be stable unless...'). It then concludes that because Valoria had commodity backing, it was stable—thus treating a necessary condition as sufficient. The statement provided incorrectly claims the argument does the opposite (treating a sufficient condition as necessary).

Adım Adım Çözüm

1
Diagram the conditional logic in the first sentence to identify the established relationship.
Stable Currency -> Backed by Tangible Commodity. This means commodity backing is a necessary condition for stability.
The phrase 'cannot be... unless' introduces a necessary condition.
2
Identify the application of the conditional logic in the remainder of the argument.
The argument states Valoria had the necessary condition (backed by silver) and concludes it achieved the sufficient condition (stable currency).
This shows how the author uses the premise to support the conclusion.
3
Determine the precise logical flaw committed by the economist.
The argument treats a necessary condition (commodity backing) as a sufficient condition for stability (an Illegal Reversal).
Affirming the consequent is a classic logical fallacy.
4
Evaluate the proposed statement against the identified flaw.
The statement claims the argument treats a sufficient condition as a necessary one. This is the exact opposite of the actual flaw, making the statement false.
Precision in identifying the directionality of conditional logic flaws is required.

Anahtar Kavram

Identifying the precise directionality of a necessary vs. sufficient condition flaw (Illegal Reversal).
Soru 175Soru →

Biologist: The recent 40 percent decline in our region's honeybee population is likely caused by the pesticide Hexa-Trol, which local orchards began using two years ago. Laboratory studies have definitively shown that the active chemical in Hexa-Trol is highly toxic to honeybees.

True or False: The biologist's argument logically requires the assumption that the honeybees in the region forage in areas where they are exposed to the pesticide applied by the local orchards.

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Cevap: True

Cevap

True
The argument concludes that a specific pesticide is causing a population decline in the wild based on laboratory evidence of its toxicity. For this laboratory finding to explain the real-world decline, the wild bees must actually come into contact with the pesticide. If we apply the Negation Test and assume the bees are not exposed to the pesticide applied by the orchards, the entire argument falls apart. Therefore, this is a logically necessary assumption.

Adım Adım Çözüm

1
Identify the main conclusion of the argument.
The conclusion is that the recent decline in the local honeybee population is likely caused by the pesticide Hexa-Trol.
Understanding the core claim is required to determine what unstated premises must be true for the claim to hold.
2
Identify the premises provided to support the conclusion.
The premises are: 1) The decline began after local orchards started using Hexa-Trol two years ago. 2) Laboratory studies show the chemical in Hexa-Trol is highly toxic to honeybees.
We must evaluate the explicit evidence the author uses to build the argument.
3
Locate the logical gap between the premises and the conclusion.
The argument jumps from the fact that a chemical is toxic in a controlled laboratory setting to the conclusion that it is actively killing bees in the wild.
Necessary assumptions often bridge the gap between theoretical or isolated evidence and real-world outcomes.
4
Apply the Negation Test to the provided statement to see if it is strictly necessary.
Negated statement: The honeybees are NOT exposed to the pesticide applied by the local orchards. If this negated statement is true, the pesticide cannot possibly be the cause of their decline, completely destroying the argument.
The Negation Test is the definitive method to prove whether an assumption is logically necessary for an argument to survive.

Anahtar Kavram

Necessary Assumption
Soru 176Soru →

Evaluate the flawed causal claims, predictions, and historical hypotheses presented below. Which specific piece of new evidence provides the most robust logical support for each argument's main conclusion? Match each argument (left) to its strongest supporting evidence (right).

Soldaki öğeye tıklayın, sonra eşleşen sağdaki öğeye tıklayın

Öğeler

An anthropologist argues that the sudden adoption of bronze tools by the highland Q'ero tribes resulted from peaceful trade with lowland empires, not military conquest. The discovered bronze artifacts lack the decorative engravings typical of lowland soldiers' weapons.
A marine biologist asserts that the unprecedented bleaching of the Aethel Coral Reef is primarily caused by chemical runoff from a newly opened coastal desalination plant, rather than the recently documented slight increase in local ocean temperatures.
A retail analyst predicts that the bookstore chain PageTurner will see a significant increase in profit margins next quarter. The chain recently replaced its human cashiers with automated kiosks, which cost considerably less to operate than paying employee wages.
A neurologist hypothesizes that frequent engagement with short-form video content fundamentally reduces an adult's baseline attention span. A clinical survey found that adults who watch short-form videos for over three hours daily performed significantly worse on sustained-focus tests than non-watchers.

Eşleşmeler

Cevabı ve açıklamayı göster

Cevap

The correct matches validate causal links by establishing controls, ruling out reverse causality, eliminating negative side-effects, and corroborating structural assumptions.
Each correct match directly addresses the specific logical vulnerability of its corresponding argument. The archaeological evidence removes the military utility of the bronze, the ecological evidence isolates the chemical variable from the temperature variable, the financial evidence protects the cost-savings from revenue losses, and the medical evidence proves the chronological direction of the psychological effect.

Adım Adım Çözüm

1
Analyze the Anthropology argument (L1)
Identify the logical gap: A lack of decorative engravings does not definitively prove the tools were not used in war.
Matching it with the evidence of functionally non-martial tools (R1) closes this gap, supporting the peaceful trade conclusion.
2
Analyze the Marine Biology argument (L2)
Identify the logical gap: Both chemicals and heat are present, and heat is a known alternative cause for bleaching.
Matching it with evidence of a control ecosystem (R2) isolates the chemical runoff as the primary culprit, proving heat alone did not cause the bleaching.
3
Analyze the Economics argument (L3)
Identify the logical gap: Lower wage costs only improve profit margins if revenues and other operational costs remain stable.
Matching it with evidence of stable transaction rates and inventory shrinkage (R3) rules out the potential negative side effects of kiosks.
4
Analyze the Neuroscience argument (L4)
Identify the logical gap: The survey is a cross-sectional snapshot, leaving the argument vulnerable to reverse causality (people with short attention spans preferring short videos).
Matching it with longitudinal data proving the groups were equal beforehand (R4) confirms the direction of causation.

Anahtar Kavram

Strengthening arguments by closing causal gaps, ruling out alternative explanations, and validating implicit assumptions.
Soru 177Soru →

Agricultural Economist: In 2024, the nation of Oakhaven banned the import of proprietary autonomous agricultural drones, prompting domestic farmers to adopt locally manufactured, open-source drones instead. Over the subsequent two years, agricultural yields in Oakhaven increased by 15%, and the average annual cost of farm maintenance dropped substantially. Clearly, the shift to open-source, locally manufactured drones is more efficient for Oakhaven's agricultural sector than relying on imported proprietary models.

Which of the following statements, if true, independently strengthen the economist's argument? (Select all that apply.)

Geçerli olan tümünü seçin

Cevabı ve açıklamayı göster

Cevap: Weather patterns, soil health metrics, and seed varieties utilized in Oakhaven over the past two years were virtually identical to those in the two years immediately preceding the 2024 ban.; The previously imported proprietary drones required shipping to foreign facilities for routine servicing, causing prolonged downtime during critical harvests, whereas open-source drones are rapidly serviced on-site using locally 3D-printed parts.

Cevap

The statements ruling out alternative environmental causes for the yield increase and detailing the localized, faster repair mechanism.
The argument concludes that open-source drones are more efficient based on two observed phenomena: a 15% yield increase and a drop in maintenance costs. The correct answers bolster this causal claim in two distinct ways. The first correct statement eliminates alternative explanations for the yield increase by confirming that weather and soil factors remained constant, meaning the drones are highly likely to be the catalyst. The second correct statement provides the missing mechanical link for the cost drop by contrasting the efficient on-site repair of the new drones with the prolonged, expensive foreign shipping required by the old proprietary models.

Adım Adım Çözüm

1
Deconstruct the argument's core structure.
Premise: Switched from proprietary to open-source drones. Premise: Yields increased 15% and maintenance costs dropped. Conclusion: Open-source drones are more efficient.
Identifying the premises and main conclusion is strictly necessary to precisely evaluate the logical gaps.
2
Identify logical vulnerabilities and causal assumptions.
The argument assumes that the new drones actually caused the yield increase (ignoring weather/fertilizer variables) and that the new drones are responsible for the cost drop (ignoring potential shifts in subsidy or labor).
Strengthening an argument typically involves identifying and systematically patching these specific vulnerabilities.
3
Evaluate the options against the identified vulnerabilities.
One correct statement explicitly eliminates alternative variables (weather, seeds) for the yield spike. The other correct statement explains exactly how the new drones lowered costs (on-site repair vs. foreign shipping).
Options that rule out alternate causes or explain the causal mechanism directly increase the overall plausibility of the conclusion.

Anahtar Kavram

Strengthen (Causal Reasoning and Eliminating Alternate Explanations)
Soru 178Soru →

Consider the following argument:

Only algorithms that undergo rigorous adversarial testing can successfully identify zero-day vulnerabilities. Furthermore, if an algorithmic system requires massive computational overhead, it cannot be deployed on edge devices. The newly developed 'Aegis' protocol is capable of identifying zero-day vulnerabilities. Therefore, the 'Aegis' protocol cannot be deployed on edge devices.

Statement: The assumption "Any algorithmic system that does not require massive computational overhead has not undergone rigorous adversarial testing" is sufficient to logically guarantee the argument's conclusion.

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Cevap: True

Cevap

True
The statement accurately identifies a sufficient assumption. The required logical bridge is 'Rigorous Testing →\rightarrow Massive Overhead'. The provided assumption is its valid contrapositive ('∼\sim Massive Overhead →\rightarrow ∼\sim Rigorous Testing'), which perfectly completes the deductive chain and guarantees the conclusion.

Adım Adım Çözüm

1
Map the formal logic of the premises.
Identify Zero-Day →\rightarrow Rigorous Testing. Massive Overhead →\rightarrow Cannot Deploy on Edge. Aegis →\rightarrow Identify Zero-Day.
Translating the text into conditional relationships is necessary to find the structural gap in the argument.
2
Identify the conclusion and trace the existing logical chain.
Conclusion: Aegis →\rightarrow Cannot Deploy on Edge. Current chain: Aegis →\rightarrow Identify Zero-Day →\rightarrow Rigorous Testing.
This establishes what is known and what needs to be proven deductively.
3
Determine the required missing link.
We need to connect 'Rigorous Testing' to 'Cannot Deploy on Edge'. Since 'Massive Overhead' leads to 'Cannot Deploy on Edge', the required bridge is: Rigorous Testing →\rightarrow Massive Overhead.
A sufficient assumption must fill the exact deductive gap to guarantee the conclusion.
4
Evaluate the provided assumption against the required missing link.
The provided assumption is: Does not require massive overhead →\rightarrow Has not undergone rigorous testing (∼\sim Massive Overhead →\rightarrow ∼\sim Rigorous Testing). This is the logically equivalent contrapositive of the required bridge (Rigorous Testing →\rightarrow Massive Overhead).
A contrapositive functions identically to the original conditional statement, making the assumption completely sufficient.

Anahtar Kavram

Sufficient assumptions must provide absolute logical validity to the conclusion by supplying a missing deductive link. This missing link can be presented in its contrapositive form and remain entirely valid.
Soru 179Soru →

University administrator: Our alumni donation rate has dropped by 15% since we replaced our quarterly printed alumni magazine with a monthly email newsletter. Therefore, to restore our alumni donation rate to its previous level, we must immediately return to sending the printed magazine.

Statement: To logically evaluate the validity of the administrator's argument, it is necessary to determine whether there has been a general economic downturn affecting the disposable income of alumni since the switch to the email newsletter.

Cevabı ve açıklamayı göster

Cevap: True

Cevap

The statement is True.
The statement correctly identifies a piece of information that is crucial for evaluating the argument. The administrator observes a correlation (the format changed, and donations dropped) and assumes a causal relationship (the format change caused the drop). In causal arguments, discovering an alternate cause weakens the conclusion, while eliminating an alternate cause strengthens it. By applying the Variance Test, if an economic downturn did occur (Yes), the drop in donations is likely due to alumni having less disposable income, which severely weakens the claim that returning to print will fix the issue. If an economic downturn did not occur (No), this alternate cause is eliminated, strengthening the administrator's causal claim. Because polar opposite answers to the question yield opposite logical effects on the argument's validity, the statement is a necessary point of evaluation.

Adım Adım Çözüm

1
Identify the core argument, including the premises and the main conclusion.
Premise: Donation rates dropped 15% after switching from print to email. Conclusion: Returning to print will restore donation rates.
Evaluating an argument first requires isolating the causal relationship the author assumes.
2
Identify the flaw or assumption in the argument's reasoning.
The argument assumes that the change in publication format is the sole cause of the drop in donations, ignoring other potential factors (a correlation vs. causation flaw).
Recognizing causal assumptions is essential for determining what information would strengthen or weaken the conclusion.
3
Apply the Variance Test to the provided statement.
If 'Yes' (an economic downturn occurred), it provides an alternate cause for the drop, weakening the conclusion. If 'No' (no downturn occurred), it eliminates a potential alternate cause, strengthening the conclusion.
The Variance Test definitively proves whether a piece of information is logically necessary to evaluate an argument.

Anahtar Kavram

Evaluate the Argument (Variance Test on Alternate Causes)
Soru 180Soru →

Public Health Official: Over the last decade, the municipality of Veridia has seen a 25 percent increase in residents diagnosed with chronic insomnia. During this same period, surveys indicate that the average daily screen time for adults in Veridia rose by over 30 percent. Because no other major public health trends were identified, this surge in screen time must be the primary factor driving the rise in chronic insomnia.

Which of the following, if true, most strengthen the official's argument? (Select all that apply)

Geçerli olan tümünü seçin

Cevabı ve açıklamayı göster

Cevap: Neurological research demonstrates that the specific wavelengths of light emitted by modern digital devices strongly suppress the human brain's production of sleep-inducing hormones.; Neighboring municipalities with similar demographics to Veridia, but where average screen time remained stable over the last decade, recorded no significant increase in chronic insomnia.

Cevap

The correct options are the one describing the biological mechanism of blue light suppressing sleep hormones, and the one showing that neighboring municipalities without an increase in screen time saw no increase in insomnia.
The official concludes that increased screen time caused the rise in insomnia based purely on their concurrent increase over a decade. To strengthen a causal argument, one must bolster the specific link between the purported cause and the effect. The correct answers achieve this in two classic ways: first, by providing a biological mechanism that explains exactly how the cause produces the effect (blue light suppressing hormones); and second, by showing a control group where the cause is absent and the effect is simultaneously absent (neighboring towns with stable screen time and stable insomnia rates).

Adım Adım Çözüm

1
Analyze the stimulus to identify the premises and the main conclusion.
Premises: Insomnia increased by 25% and screen time increased by 30% simultaneously. Conclusion: The surge in screen time is the primary factor driving the rise in chronic insomnia.
Understanding the exact causal claim being made is necessary to evaluate what evidence would logically strengthen it.
2
Identify the logical gaps in the official's causal argument.
The argument assumes that a correlation between two trends implies causation, ignoring potential alternative causes, the possibility of reverse causation, and the need for a mechanism linking the two.
Strengthening a causal argument requires finding evidence that directly addresses and bridges these logical vulnerabilities.
3
Evaluate the answer choices for standard strengthening properties.
Look for options that provide a causal mechanism, show the effect is absent when the cause is absent (control group), or explicitly rule out alternative explanations. Avoid options that provide alternative causes or demonstrate reverse causation.
These are the recognized methods for validating a causal relationship in logical reasoning assessments.

Anahtar Kavram

Strengthening Causal Arguments
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