All practice questions

Art Conservator: A seventeenth-century oil portrait recently attributed to the Dutch master Rembrandt features paint layers bound with walnut oil rather than linseed oil. Archival guild records demonstrate that seventeenth-century Dutch painters used linseed oil as their standard binding medium, whereas walnut oil was utilized almost exclusively by contemporary Italian workshops. Because Rembrandt worked exclusively in the Netherlands throughout his career and never traveled to Italy, the portrait was almost certainly painted by an Italian artist rather than Rembrandt.

Which one of the following is an assumption on which the art conservator's argument depends?

Passage A
The transition from alchemy to modern chemistry during the seventeenth century is often mischaracterized as a gradual evolution. In reality, it constituted a sharp epistemological rupture. Early modern chemists, seeking intellectual legitimacy, established their discipline by explicitly rejecting the alchemical tradition. The cornerstone of this new scientific paradigm was a commitment to methodological transparency. Where alchemists employed deliberate obfuscation—using complex allegories and ciphers to conceal their methods from the uninitiated—the new chemists insisted on clear, step-by-step descriptions of their experiments. This rhetoric of transparency was not merely a stylistic choice; it was the foundational principle that separated legitimate natural philosophy from esoteric mysticism, enabling the collective verification of results that defines modern scientific inquiry.

Passage B
Historical narratives that posit a clean break between alchemy and early modern chemistry rely too heavily on the public declarations of seventeenth-century natural philosophers. While figures like Robert Boyle actively cultivated a public image of open, accessible science, a closer examination of their private correspondence and laboratory notebooks reveals a different reality. These early chemists continued to operate within highly restricted, secretive networks, frequently employing the very ciphers and allegorical language they publicly decried. This secrecy was driven by a desire to protect lucrative discoveries and maintain intellectual priority. The celebrated "transparency" of the era was largely a carefully managed facade. By selectively publishing certain findings while hoarding crucial methodological details, these practitioners successfully rebranded their work to align with emerging institutional expectations, even as their day-to-day practices remained deeply indebted to the secretive traditions of their alchemical predecessors.

Which one of the following most accurately describes how the author of Passage B would likely respond to the assertion in Passage A that the new chemists' "rhetoric of transparency was not merely a stylistic choice"?

Passage A
The recent surge in scholarship arguing for the widespread integration of algorithmic decision-making in the judiciary often glosses over fundamental epistemological gaps. While algorithms can demonstrably process vast troves of precedent more rapidly than any human clerk, their capacity is strictly quantitative. To elevate this computational efficiency to the realm of judicial reasoning is to fundamentally misunderstand jurisprudence. Justice is not merely the aggregation of historical patterns; it is the contextual application of equity. Those who champion an automated bench are not merely overly optimistic about technological progress; they are actively eroding the philosophical bedrock of legal interpretation by conflating data processing with normative judgment.

Passage B
The integration of algorithmic tools into judicial processes has elicited predictable hand-wringing from traditionalists, who argue that machines cannot grasp the nuances of equity. This defensive posture, while understandable, misapprehends the proposed role of these technologies. No serious scholar suggests replacing judges with algorithms; rather, the goal is to augment human judgment by mitigating cognitive biases and ensuring consistency in sentencing decisions. The algorithmic systems currently in development are imperfect, certainly, and require rigorous oversight. However, dismissing their utility outright based on idealized notions of human judicial infallibility is a counterproductive stance that ignores the deeply flawed, subjective reality of our current legal system.

Comparative Statement: While Author A adopts a tone of principled resistance toward algorithmic decision-making in the judiciary, Author B's attitude can best be described as one of unreserved enthusiasm for the technological replacement of human judges.

Under regional airspace management guidelines, any aerial survey platform operating in the coastal estuary that is equipped with lidar bathymetry is subject to automated transponder logging. No aerial survey platform subject to automated transponder logging is certified for low-altitude wildlife sanctuary flyovers. Every survey platform operated by the state marine research unit is equipped with lidar bathymetry, and at least some survey platforms operated by the state marine research unit are certified for low-altitude wildlife sanctuary flyovers.

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

Match each short argument with the description of its underlying logical structure or flaw.

Marine Biologist: Over the past decade, populations of native ribbon kelp in the North Sound estuary declined by sixty percent. During the same period, water salinity in the estuary dropped significantly due to increased agricultural runoff from nearby farms. Because laboratory experiments confirm that juvenile ribbon kelp tissue suffers cellular degradation when exposed to reduced salinity, the decline in North Sound's ribbon kelp must be primarily caused by this agricultural runoff.

Which of the following statements, if true, undermine the marine biologist's argument? (Select all that apply.)

For each logical argument presented below, identify the unstated assumption upon which the argument's conclusion strictly depends. Apply the Negation Test: if the logical opposite of the assumption destroys the argument's conclusion, it is the correct necessary assumption.

Organic chemists studying pharmaceutical manufacturing protocols have documented the following facts regarding the synthesis of Compound X-9:

• Any synthesis protocol for Compound X-9 that utilizes an immobilized lipase enzyme requires a substrate solution with a pH below 6.5.
• Every synthesis protocol requiring a substrate solution with a pH below 6.5 necessitates subsequent chiral flash chromatography to isolate the active enantiomer, unless the reaction vessel is maintained under supercritical carbon dioxide conditions.
• No synthesis protocol that necessitates chiral flash chromatography can yield an enantiomeric purity exceeding 98%.
• During Laboratory Beta's recent production run of Compound X-9, the reaction vessel was not maintained under supercritical carbon dioxide conditions, and the synthesis yielded an enantiomeric purity of 99.4%.

Based on the facts above, evaluate the truth value of the following statement:

"Laboratory Beta's production run of Compound X-9 did not utilize an immobilized lipase enzyme."

Each of the following arguments contains a distinct vulnerability in its logical reasoning. Match each flawed argument with the abstract description that most accurately identifies its reasoning error.

Every member of the astronomy club attended the guest lecture. Jordan attended the guest lecture, so Jordan must be a member of the astronomy club.

The flawed pattern of reasoning in the argument above is most similar to that in which one of the following?

The following arguments each contain a distinctive reasoning vulnerability. Match each flawed argument on the left with the statement on the right that most accurately describes the flaw in its reasoning.

Archaeometallurgical investigations of Bronze Age metal artifacts recovered from the Cilician Plain established the following facts:

• Every artifact cast from an arsenic-bronze alloy originated in a high-altitude highland furnace.
• Any artifact originating in a high-altitude highland furnace contains distinct nickel trace impurities only if it was smelted using polymetallic sulfide ores.
• No artifact smelted using polymetallic sulfide ores exhibits lead-isotope ratios characteristic of lowland alluvial deposits.
• Some excavated spearheads from the Cilician Plain are arsenic-bronze artifacts containing distinct nickel trace impurities.

If the statements above are true, which of the following statements must also be true? (Select all that apply)

Urban Planner: Commuters who switch from driving personal vehicles to taking public transit experience a significant reduction in daily commute stress only if their transit trip requires no transfers between routes. A municipal transit authority plans to reduce commuter stress by introducing express bus lines that provide direct, transfer-free service between residential suburbs and the city center. Therefore, suburban commuters who switch from driving to these new express bus lines will experience a significant reduction in their daily commute stress.

Which one of the following is an assumption required by the urban planner's argument?

Passage A

The invention of the movable-type printing press in the mid-fifteenth century brought about a profound revolution in the sciences, primarily through the unprecedented standardization of visual and mathematical information. Prior to this technological innovation, scientific texts relied entirely on hand-copied illustrations and manually transcribed equations—a painstaking process that was highly susceptible to human error. A botanist copying a detailed drawing of a medicinal plant might slightly alter the shape of a leaf, leading to potentially dangerous misidentifications by later readers. The printing press effectively eliminated this dangerous variability. By using identical woodblock cuts, printers could produce hundreds of copies of a complex scientific diagram with exact precision.

Some traditional scholars at the time feared that the mass production of books would inevitably lead to widespread intellectual laziness. However, this concern was largely unfounded. Instead, the advent of the printing press significantly accelerated the dissemination of information across the European continent. For the very first time in history, an anatomical treatise published in Northern Italy could be analyzed by physicians in England just weeks later. This ensured that scholars separated by vast distances were working from the exact same visual data. This newfound reliability of reproduction, combined with the rapid physical distribution of texts, served as the true catalyst for the rigorous scientific advancements of the sixteenth century.

Passage B

While traditional historians frequently emphasize the printing press’s capacity to mass-produce texts and standardize visual diagrams, its most crucial impact on the scientific revolution was arguably demographic rather than strictly technological. Before the widespread adoption of the press, scientific and philosophical manuscripts were overwhelmingly composed in Latin. This linguistic barrier severely restricted access to a small, highly educated elite composed almost entirely of clergy and university scholars. The economics of the printing industry, however, demanded significantly larger consumer markets to remain financially profitable.

Consequently, ambitious publishers began translating and printing important scientific works in common vernacular languages, such as English, French, and German. This radical shift effectively democratized scientific knowledge, actively inviting literate craftsmen, engineers, and navigators into intellectual discussions from which they had previously been entirely excluded. It is undeniably true that the printing press rapidly accelerated the speed at which new information spread throughout Europe, breaking down old geographic barriers. Yet, for the development of modern science, the sheer speed of this transmission matters somewhat less than the fact that this new information was now arriving directly into the hands of practical, working-class professionals. These were the individuals who could immediately apply and test these abstract scientific theories in concrete, real-world settings.

Which one of the following details about the impact of the printing press is explicitly mentioned in both Passage A and Passage B?

Passage A
The Late Bronze Age Mediterranean was characterized by a highly integrated, specialized international economy. While many historians point to external shocks, such as droughts or invasions, as the definitive catalysts for the era's collapse, the root cause was internal. The hyper-specialization of these states made them structurally brittle. Their rigid administrative systems and heavy reliance on imported goods meant that a disruption in any single node—such as a localized famine or a regional conflict—inevitably cascaded across the network, leading to systemic failure. Thus, external shocks merely exposed a structural inevitability; the economic architecture of the system dictated that it was destined to fracture under its own weight.

Passage B
The tendency to view the Late Bronze Age collapse as an inevitable consequence of systemic economic fragility ignores the resilience these societies had demonstrated for centuries. The interconnected trade networks, rather than being inherently brittle, actually provided a robust buffer against localized failures by allowing resources to be dynamically redirected to struggling regions. What precipitated the catastrophic collapse was not a structural flaw waiting to be exposed by a minor disruption, but rather an unprecedented, century-long megadrought that decimated agricultural yields across the entire Mediterranean basin. No economic system, regardless of its internal structure, could have withstood such a profound and widespread environmental shock.

Based on the passages, the authors would be most likely to disagree over which of the following?

Pair each of the following short deductive arguments with the statement that most accurately characterizes its logical form or reasoning defect.

Marine biologists investigating benthic ecosystems in deep oceanic trenches have established the following facts:

• Any abyssal organism that derives energy primarily from sulfur-oxidizing endosymbionts produces specialized hemoglobin variants.
• Every benthic species that produces specialized hemoglobin variants can survive prolonged periods of severe hypoxia.
• No organism capable of surviving prolonged periods of severe hypoxia can inhabit shallow reef zones with high dissolved oxygen fluctuations.
• Several newly cataloged gastropod species in the trench derive energy primarily from sulfur-oxidizing endosymbionts.

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

Agricultural Scientist: In an effort to reduce synthetic pesticide applications, orchard managers introduced a predatory mite species into twenty commercial apple orchards to suppress herbivorous red spider mite populations. Over the subsequent three seasons, red spider mite damage to apple crops in these orchards fell by forty-five percent. Because synthetic pesticide applications remained constant across all twenty orchards throughout this period, the introduction of the predatory mites was clearly the primary cause of the reduction in crop damage.

Statement: If regional meteorological records confirm that unusually heavy rainfall during those three seasons fostered the widespread proliferation of a native fungal pathogen lethal to red spider mites, the agricultural scientist's conclusion is significantly weakened.

Passage A
Historians of science frequently debate the precise tipping point of the Copernican revolution, but the documentary record overwhelmingly points to the introduction of the telescope as the definitive catalyst. While mathematical critiques of the geocentric Ptolemaic system certainly circulated among European astronomers prior to 1609, these theoretical arguments, no matter how geometrically elegant, were fundamentally incapable of dislodging a deeply entrenched cosmological worldview backed by centuries of philosophical orthodoxy. Theoretical models could propose alternatives, but they could not provide the empirical invalidation required to force a paradigm shift. It was only Galileo Galilei's direct observational evidence—most notably his documentation of the phases of Venus and the orbital mechanics of Jupiter's moons—that supplied the incontrovertible physical proof necessary to fracture the geocentric consensus. By making the previously abstract heavens visually accessible and undeniably contrary to Ptolemaic predictions, the telescope transformed a specialized mathematical debate into an undeniable physical reality, definitively rendering purely theoretical defenses of geocentrism obsolete.

Passage B
The popular narrative that the telescope single-handedly overthrew the Ptolemaic system dramatically oversimplifies the mechanics of early modern scientific advancement. The Copernican paradigm shift was inherently a mathematical and philosophical triumph, pioneered by figures like Johannes Kepler whose laws of planetary motion meticulously resolved the geometric impossibilities of the geocentric model. By the time Galileo pointed his optical instrument at the night sky, the theoretical scaffolding of the Ptolemaic universe had already collapsed under the weight of its own mathematical inconsistencies and the superior predictive power of heliocentric computations. To elevate the telescope to the role of primary revolutionary agent is to conflate popular vindication with scientific revolution. The astronomers and mathematicians who truly dismantled the old cosmos did so with calculus and geometry, not with glass lenses. The visual anomalies cataloged by Galileo provided, at best, supplementary visual corroboration for a victory that had already been conclusively won on paper by the mathematical vanguard.

Statement: Based on the passages, the author of Passage A would evaluate the assertion made in Passage B—that the theoretical scaffolding of the Ptolemaic universe had already collapsed prior to the telescope's use—as an accurate characterization of the historical paradigm shift.

Biologist: Cuttlefish rapidly alter their skin patterning to produce disruptive coloration when resting near heterogeneous coral rubble, but switch to uniform background matching when traversing open sand flats. Researchers originally hypothesized that this behavioral switching is driven by energetic efficiency, assuming that maintaining complex disruptive patterns demands substantially more neural computation and muscular tension in chromatophores than uniform matching. However, recent physiological assays demonstrate that maintaining uniform coloration requires just as much metabolic energy and muscular activation as maintaining disruptive patterning. Therefore, the hypothesis that energetic efficiency drives this behavioral switching must be false.

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