Reading Comprehension: Application and Logic

Passage:
In ecological conservation, the phenomenon of "trophic phenological mismatch" describes a systemic failure mode occurring when two historically synchronized mutualistic species rely on divergent environmental cues. For example, in certain temperate woodland ecosystems, migratory songbirds initiate spring nesting based strictly on photoperiodic cues (day length), whereas the herbivorous caterpillars that constitute their primary nestling food source emerge in response to cumulative thermal degree-days (ambient temperature). Under trend-line atmospheric warming, thermal thresholds are reached earlier in the season, causing caterpillar populations to peak and decline weeks prior to bird clutch hatching. Lacking adequate nutritional density during the critical brood window, avian reproductive output drops precipitously, ultimately causing a collapse in caterpillar predation later in the season. Ecologists observe, however, that when an opportunistic, secondary insect species responds dynamically to ambient thermal shifts and provides an alternative food source, it serves as a "trophic bridge," stabilizing the avian population until photoperiodic cues align with long-term ecosystem equilibrium.

Which of the following scenarios in a non-biological domain is most structurally analogous to the interaction between the songbirds, caterpillars, and secondary insect species described in the passage?

In cognitive archaeology, researchers have long debated the origins of human symbolic thought. Proponents of the "cognitive leap" model contend that the sudden proliferation of symbolic artifacts—such as engraved ochre and shell beads—in Southern Africa approximately 75,000 years ago points to a rapid genetic mutation that reorganized the human brain for complex recursive language. They argue that the virtual absence of earlier symbolic material culture constitutes definitive evidence that earlier hominins lacked symbolic cognitive capacity. However, critics of this model point to isolated discoveries of pigment processing and long-distance raw material transport dating back nearly 300,000 years, arguing instead for a gradual, mosaic accumulation of behavioral modernity. These critics maintain that the apparent absence of widespread symbolic artifacts prior to 75,000 years ago is an artifact of taphonomic decay—environmental conditions such as humidity decomposing fragile organic goods—and low demographic density. Because small, fragmented populations frequently innovate practices but lack the interconnected social networks needed to transmit them across generations, cultural innovations often vanish locally. Thus, critics conclude that the apparent "explosion" of symbolic culture 75,000 years ago reflects rising population density and favorable preservation conditions rather than a sudden biological restructuring of the human mind.

Which of the following is an unstated assumption upon which the critics' argument against the "cognitive leap" model depends?

Passage:
Historians examining the financial innovations of the seventeenth-century Dutch Republic frequently attribute the stability of the Amsterdam grain market to the introduction of early maritime insurance contracts. These contracts, which shifted risk from individual merchant-captains to syndicates of wealthy investors, are presumed to have cushioned grain importers against catastrophic shipwrecks during the tumultuous Baltic trade voyages. However, an analysis of contemporary shipping manifests and merchant ledgers reveals that less than ten percent of grain-carrying vessels sailing from Danzig to Amsterdam were actually insured under these contracts. Instead, the overwhelming majority of grain merchants relied on informal credit networks and diversified consignment shipping—distributing a single grain cargo across multiple vessels—to hedge against loss. Consequently, the assertion that formal maritime insurance was the primary structural pillar stabilizing Amsterdam's grain supply during this period overstates its historical efficacy, as the market's resilience was predominantly maintained through informal risk-dispersion practices rather than institutionalized financial instruments.

Statement:
The author's argument that formal maritime insurance was not the primary structural pillar of Amsterdam's grain market stability relies on the unstated assumption that informal risk-dispersion practices were not themselves dependent on or structurally facilitated by the existence of formal insurance markets.

Passage:
In early nineteenth-century New England, country banks frequently issued banknotes that circulated in Boston at a discount due to the transaction costs of redeeming them for specie (gold or silver coin) at distant rural locations. In 1824, Boston’s Suffolk Bank established a centralized system requiring participating country banks to maintain permanent specie deposits in Boston to redeem their notes at par value. Economic historians have long debated whether Suffolk’s policy was primarily a predatory effort to eliminate rural competitors or an institutional innovation aimed at stabilizing regional currency. Dr. Elena Rostova contends that the system functioned chiefly as a benevolent private clearinghouse designed to reduce currency transaction costs and stabilize monetary circulation. Rostova emphasizes that by guaranteeing par redemption, Suffolk reduced information asymmetry among merchants, thereby lowering regional interest rates and spurring interstate trade.

However, critics point out that Suffolk routinely charged high maintenance fees to country banks that lacked political leverage while exempting major metropolitan institutions. Moreover, rural bank failures actually increased during the initial five years of Suffolk’s expansion, as country banks struggled to maintain required specie reserves during seasonal agricultural downturns. Nevertheless, Rostova maintains that the eventual homogenization of banknotes in New England created a unified monetary zone decades before the implementation of federal banking regulations.

Question:
Which of the following discovery findings, if true, would most seriously weaken Dr. Rostova's assertion regarding the primary function of the Suffolk Bank system?

For decades, agrarian historians attributed the dramatic increase in grain yields during the eighteenth-century Norfolk Agricultural Revolution primarily to the adoption of the four-course crop rotation system, which incorporated turnips and clover alongside wheat and barley. According to the traditional consensus, turnips served predominantly as winter fodder, enabling farmers to sustain larger livestock herds through the winter months. This increase in herd size supposedly produced unprecedented volumes of animal manure, which, when applied to fields, restored depleted nitrogen levels and propelled cereal crop yields.

Recently, however, historical agronomists analyzed organic nitrogen isotope ratios in soil cores extracted from eighteenth-century Norfolk agricultural estates. Finding that soil nitrogen concentration increased substantially during this period even in sectors where livestock density remained strictly constant, these researchers argued that manure application was secondary. Instead, they hypothesized that clover—a legume that hosts nitrogen-fixing Rhizobium bacteria—directly synthesized atmospheric nitrogen into the soil. Based on these isotopic findings, the author asserts that clover's biological nitrogen fixation, rather than manure generation from increased livestock herds, was the primary mechanism behind the regional yield surge.

Which of the following, if true, would most weaken the author's assertion regarding the primary mechanism behind the Norfolk yield surge?

During the Paleocene-Eocene Thermal Maximum (PETM), approximately 56 million years ago, a massive influx of atmospheric carbon triggered rapid global warming and pronounced ocean acidification. Paleoclimatologists analyzing benthic foraminifera—microscopic shell-building organisms inhabiting the ocean floor—observed a profound extinction event alongside widespread shell dissolution in surviving taxa. Traditional hypotheses attributed this mortality primarily to reduced carbonate saturation states in deep waters, which impede calcification. However, recent geochemical analyses of sediment cores from the South Atlantic reveal an unexpected asymmetry: while epifaunal benthic species (those living directly on the sediment surface) suffered extinction rates exceeding 70 percent, infaunal species (those dwelling within the sediment substrate) experienced significantly lower mortality and minimal shell degradation.

To reconcile this discrepancy, researchers examined pore-water chemistry within deep-sea sediments. They discovered that infaunal habitats naturally maintain microenvironments characterized by elevated metabolic carbon dioxide concentrations from organic matter decomposition by anaerobic bacteria. Consequently, infaunal calcifiers had evolved cellular mechanisms to synthesize calcium carbonate under chronically low pH conditions long before the PETM onset. Epifaunal organisms, conversely, had adapted to the stable, supersaturated conditions of the open water column and lacked such physiological pre-adaptations. Furthermore, the decay of organic material in sediment pore-waters produced a buffering effect when surrounding sediment minerals dissolved, temporarily stabilizing local carbonate ion concentrations during peak acidification.

Based on the passage, which of the following statements regarding benthic calcifiers during the PETM can be logically inferred from the premises provided?

Passage:
In early modern Europe, municipal grain reserves were maintained primarily to cushion urban populations against sudden harvest failures. Historical demographic analyses reveal that during the mid-seventeenth-century agrarian crises, towns with public granaries experienced lower mortality spikes than surrounding rural hinterlands. However, parish records indicate that these granaries were financed via regressive head taxes levied exclusively on suburban agrarian tenants rather than urban merchants. Consequently, during multi-year droughts, although urban death rates stabilized, the surrounding rural tenant population suffered disproportionately severe mortality spikes due to depleted financial capital, preventing them from purchasing grain sold at market prices.

Statement: Based on the passage premises, the structural financing of municipal grain reserves contributed indirectly to higher mortality rates among rural agrarian tenants during extended droughts.

Passage:
For decades, paleoclimatologists investigating the African Humid Period (11,000–5,000 years ago) attributed the expansion of Saharan vegetation primarily to orbital forcing—specifically, increased summer insolation that intensified the West African monsoon. However, climate researcher Dr. Elena Vance asserts that orbital forcing alone was insufficient to sustain deep-inland precipitation. Vance contends that a vegetation-albedo feedback loop was the essential driver: initial modest precipitation promoted early plant growth, which lowered surface albedo and increased evapotranspiration, thereby self-amplifying regional rainfall. As evidence, Vance notes that Saharan paleolake sediment cores display abrupt, non-linear shifts in pollen density during periods when insolation changes were virtually non-existent.

Statement:
Discovering that fossilized plant stomata densities in Saharan paleolake sediments remained unchanged throughout the initial two millennia of the African Humid Period would weaken Dr. Vance's assertion regarding the primary mechanism of Saharan greening.

Passage:
Historians of early modern Scandinavian forestry have long debated the ecological impacts of the seventeenth-century pine tar trade in the Baltic basin. Traditional accounts assert that intensive harvesting of Scots pine (Pinus sylvestris) for tar production depleted old-growth pine forests across southern Sweden, causing a permanent ecological transition toward deciduous broadleaf dominance in those regions. According to this view, the massive volume of pine required for kiln distillation destabilized the coniferous forest structure, allowing birch and aspen to outcompete re-establishing pine saplings.

However, recent dendrochronological and palynological studies of lake sediment cores in eastern Småland—a primary locus of tar extraction—challenge this historical consensus. Pollen profiles indicate that while pine pollen counts declined precipitously during peak tar export decades (1640–1690), coniferous pollen levels recovered to pre-industrial baselines within fifty years following the shift of Swedish tar distillation to northern Finland. Furthermore, tree-ring sequences from surviving old-growth timber reveal that timber stands adjacent to historic kiln sites exhibited accelerated radial growth rates during the late seventeenth century, rather than the stunted regrowth characteristic of broadleaf competition. Researchers hypothesize that localized tar harvesting acted primarily as a selective thinning mechanism, opening the forest canopy and releasing suppressed understory pines, rather than precipitating a broadleaf regime shift.

Evaluate the following statement:
If archival tax records from seventeenth-century eastern Småland reveal that tar distillers exclusively felled mature canopy pines while systematically preserving understory growth, this finding directly weakens the researchers' hypothesis regarding selective thinning.

Passage:
In urban microclimate studies, the thermal mitigation provided by city parks is traditionally attributed to evapotranspirative cooling from high-density tree canopies. However, recent micro-meteorological data from mid-latitude metropolises challenge this single-factor explanation. Researchers observed that during late-afternoon heatwaves, open park precincts dominated by low-lying turfgrass demonstrated ambient temperature reductions comparable to—and occasionally greater than—those measured beneath dense forest foliage.

To account for these findings, biometeorologists proposed the turbulent ventilation hypothesis. This model posits that low-profile vegetation allows uninterrupted vertical wind mixing, facilitating the rapid dissipation of surface heat plumes. Conversely, the authors suggest that dense upper-canopy foliage acts as a physical barrier to horizontal airflow, trapping warm, stagnant air pockets beneath the canopy layer during periods of atmospheric calm. Consequently, urban planners who rely exclusively on tree planting to mitigate urban heat island effects may underestimate the thermodynamic benefits of ventilated open greenspaces.

Statement:
Finding that air current velocities measured beneath dense forest canopies during windless heatwaves are substantially higher than those measured over open turfgrass would weaken the author's explanation of how dense tree foliage affects park microclimates.

For decades, paleoceanographers attributed the sudden end-Permian mass extinction primarily to intense volcanic activity in the Siberian Traps, which unleashed massive quantities of greenhouse gases and sulfur dioxide. Skeptics of this mantle-plume hypothesis, however, contend that volcanic outgassing alone fails to account for the abruptness of the marine die-off recorded in sediment cores, pointing out that catastrophic volcanic episodes typically produce gradual, protracted ecological shifts rather than sudden biotic collapse. To reconcile this discrepancy, supporters of the volcanic model have recently proposed that basaltic lava flows intruded into carbon-rich sedimentary basins, releasing vast volumes of thermogenic methane that accelerated global warming.

Critics have counterargued that if thermogenic methane driving ocean acidification were the primary driver of extinction, calcifying marine organisms should show severe, uniform mortality worldwide prior to non-calcifying species. However, recent high-resolution isotopic analysis of equatorial limestone deposits reveals that while calcifiers suffered disproportionately in shallow surface waters, deep-water non-calcifying benthic communities collapsed concurrently. This synchronicity suggests that catastrophic deep-ocean hypoxia—triggered by thermal stratification and delayed nutrient turnover—operated alongside surface acidification. Thus, the argument that differential mortality rules out thermogenic methane ignores how thermal stratification unifies these distinct kill mechanisms. Rather than invalidating the volcanic-intrusion model, the evidence of concurrent deep-water collapse demonstrates that the counterargument relies on a flawed assumption of uniform ocean chemistry.

Based on the passage, the author addresses the critics' counterargument regarding the pattern of marine mortality primarily by doing which of the following?

Passage:
Proponents of corporate governance reform frequently argue that hedge fund activism undermines long-term corporate value creation by pressuring public firm management to prioritize immediate payouts over sustained research and development (R&D). To substantiate this claim, critics cite empirical studies demonstrating that targeted firms experience an average reduction of 15 percent in annual R&D expenditure during the three years following an activist intervention. This decline in capital allocation toward innovation, reformers contend, directly degrades the firm's technological competitiveness and ultimate market viability.

However, evaluating corporate innovative capacity solely through the lens of nominal R&D spending overlooks crucial structural shifts in capital efficiency. Recent investigations into post-intervention patent output reveal that despite reduced overall innovation budgets, targeted firms consistently maintain or even increase their annual yield of high-impact patents—those cited widely across subsequent technological patents in their respective industries. Activist investors typically compel management to divest from speculative, low-yield research projects that generate high accounting costs with minimal commercial return, thereby redirecting remaining resources toward high-probability, strategically aligned core ventures. Consequently, the observed reduction in overall R&D expenditure reflects the elimination of corporate waste rather than a curtailment of productive innovation. Thus, hedge fund activism ultimately enhances, rather than impairs, a firm's long-term innovative potential.

Which of the following is an unstated assumption upon which the author's argument regarding corporate innovative potential depends?

Passage:
In organizational economics, the "ratchet effect" describes a structural inefficiency that arises in long-term procurement and incentive contracting when performance benchmarks are dynamically recalibrated based on historical output. When a principal—such as a central regulatory agency or corporate parent—uses an agent's current efficiency gains to establish elevated baselines for future evaluation periods, it inadvertently alters the agent’s strategic incentives. Consider a manufacturing subsidiary that implements a novel process innovation, resulting in a thirty percent reduction in production costs during a given quarter. Rather than permitting the subsidiary to retain the financial windfall or maintaining static targets, the corporate parent incorporates this newly demonstrated capacity into the subsidiary's standard operating quota for subsequent years. Consequently, the subsidiary is penalized for its own efficiency: it must now expend maximum effort simply to meet the revised baseline, receiving no incremental reward for surpassing original projections. Anticipating that superior performance today will permanently inflate tomorrow's performance expectations without offering proportional compensation adjustments, rational agents adopt a strategy of deliberate output restriction. They intentionally withhold operational innovations and operate below maximum capacity during early evaluation cycles. This strategic withholding ensures that performance standards remain manageable, preserving the agent's ability to satisfy contractual obligations in future periods without exhausting operational reserves. The essential dynamic is one in which an actor intentionally suppresses immediate, valuable productivity to prevent an institutional observer from locking in that peak performance as the mandatory standard for future interactions.

Which of the following scenarios is most structurally analogous to the relationship between the manufacturing subsidiary and the corporate parent described in the passage?

Consider the following passage:

In evolutionary biology, the rapid adaptation of urban-dwelling wildlife to anthropogenic stressors has sparked intense debate over the underlying mechanisms. Classical neo-Darwinian theory posits that such adaptation relies exclusively on the selection of pre-existing genetic variants or novel beneficial mutations over successive generations. However, a growing cohort of epigeneticists contends that environmentally induced DNA methylation and histone modifications allow organisms to dynamically alter gene expression within a single generation, offering a far more rapid adaptive response to urban pollution and habitat fragmentation. Critics of the epigenetic framework push back strongly against this assertion. They argue that most environmentally induced epigenetic marks are developmentally transient or erased during germline reprogramming, rendering them incapable of serving as stable units of transgenerational inheritance. Furthermore, skepticism deepens because phenotypic plasticity driven by transient epigenetic changes can shield deleterious genetic variants from natural selection, potentially relaxing selective pressure and compromising long-term population fitness. Nevertheless, recent studies on urban populations of the white-footed mouse (Peromyscus leucopus) provide a nuanced rebuttal to these skepticism-driven critiques. Researchers demonstrated that specific methylation patterns in metabolic genes persist across multiple unexposed generations in laboratory settings, directly counteracting the germline-erasure argument. Moreover, modeling indicates that initial non-genetic epigenetic shifts can buy time for populations, facilitating survival in novel toxic environments until hardwired genetic adaptations catch up—a phenomenon known as the Baldwin effect. Thus, while epigenetic inheritance may not supersede traditional genetic mechanisms, discounting its role as an immediate evolutionary buffer oversimplifies the dynamics of urban adaptation.

Evaluate the following statement based on the passage above:

Statement: According to the passage, the empirical research on the white-footed mouse serves exclusively to refute the critics' claim regarding germline erasure, without offering any logical counter to the objection that epigenetic plasticity shields deleterious mutations from natural selection.

Passage:
For decades, economic historians analyzing the early medieval silk trade attributed the commercial success of Sogdian merchant networks primarily to their adoption of a unified, standardized script across disparate Eurasian oasis kingdoms. Scholars argued that a shared written language drastically reduced transaction costs by enabling enforceable contracts and standardized bills of exchange among distant commercial outposts. However, recent epigraphic discoveries at remote caravanserai sites along the Tarim Basin present a more complex picture. Excavated parchment fragments reveal that local trade contracts were frequently drafted in regional dialects utilizing non-standardized orthographic conventions, rather than the formal, standardized Sogdian script preserved in elite administrative archives. Furthermore, financial disputes recorded in these regional documents were resolved not through formal legal appeals relying on written contractual text, but through informal arbitration conducted by local merchant elders based on unwritten customary norms.

Despite these findings, some historians maintain that the existence of a standardized Sogdian script remains the foundational prerequisite for the expansion of long-distance trans-Eurasian trade during this period. They contend that while localized transactions could rely on customary trust and dialectical scripts, trans-regional settlements spanning thousands of miles required a universal linguistic baseline to establish creditworthiness between merchants who shared no common kinship ties or local arbitration networks.

Statement: The historians' argument that a standardized script was essential for trans-regional trade expansion relies on the unstated assumption that unwritten customary norms and informal reputation networks could not reliably sustain financial transactions across long distances.

Passage:
For decades, marine geologists hypothesized that cold-water carbonate mounds—large undersea structures built from the skeletal debris of cold-water corals—formed primarily through the upward seepage of hydrocarbon-rich fluids from the seabed, which provided chemical energy for microbial mats that fueled coral larvae settlement. However, recent oceanographic surveys across the North Atlantic margin present a different picture. Researchers analyzed sediment cores from several prominent mound complexes and discovered that while deep subsurface methane leaks were occasionally present, they did not coincide temporally with the key initiation phases of mound development. Instead, high-resolution acoustic profiling and isotopic analysis revealed that mound growth spiked during periods of heightened bottom-current activity and enhanced surface water productivity. The authors of the recent study assert that cold-water carbonate mound formation is governed predominantly by hydrodynamic delivery of organic nutrients from surface waters rather than by benthic hydrocarbon seepage.

Which of the following, if true, would most weaken the authors' assertion regarding the primary cause of cold-water carbonate mound formation?

Passage:
During the Paleocene-Eocene Thermal Maximum (PETM), approximately 56 million years ago, a massive injection of carbon into the atmosphere caused rapid global warming and widespread ocean acidification. Marine geochemists studying fossilized deep-sea scleractinian corals from this period have observed a pronounced decline in skeleton calcification density. Because scleractinian corals build their calcium carbonate skeletons primarily from aragonite—a soluble mineral form of calcium carbonate—researchers long posited that the reduction in calcification density was a direct physiological response to decreased seawater aragonite saturation states during PETM ocean acidification.

However, recent micro-structural analyses of PETM coral fossils present a nuance that challenges this purely chemical explanation. Biomineralization in scleractinian corals is not a passive chemical precipitation process; rather, corals actively regulate the pH within their internal calcifying fluid, elevating it above ambient seawater levels to promote aragonite deposition. Reexaminations of trace element ratios in PETM coral specimens reveal that these organisms maintained their internal pH elevation mechanisms even at the peak of ocean acidification. Consequently, some paleontologists now argue that the observed decrease in coral skeleton calcification during the PETM was not caused by ambient seawater chemistry rendering skeleton building chemically impossible. Instead, they contend that the decline was primarily driven by thermal stress: elevated water temperatures during the PETM forced corals to divert significant metabolic energy toward cellular repair and heat-shock protein synthesis, leaving insufficient energy to fuel the total skeletal mass deposition, even while internal pH elevation was preserved.

Which of the following is an unstated assumption on which the paleontologists' argument regarding the primary cause of the decline in coral calcification depends?

Passage:
Archaeologists studying Bronze Age pastoralist migrations across the Eurasian steppe have traditionally relied on pottery typology to chart population movements. However, recent isotopic analyses of strontium ratios ($^{87}\text{Sr}/^{86}\text{Sr}$) in human tooth enamel have challenged established migration models. Because strontium ratios in tooth enamel reflect the geochemical composition of local groundwater consumed during childhood tooth development, non-local isotopic ratios serve as a definitive biomarker for individuals who relocated later in life. Researchers examining a late Bronze Age burial complex noted that over forty percent of analyzed skeletons exhibited non-local strontium signatures, leading them to conclude that the community's demographic growth was driven primarily by rapid, large-scale immigration from distant geographic zones rather than internal population growth. Nonetheless, critics point out that strontium isotopes vary significantly across micro-environments within short distances if diverse geological formations intersect. Therefore, unless local geochemical variability across adjacent grazing territories is exhaustively mapped, high isotopic variance among buried individuals cannot conclusively prove long-distance regional immigration.

Statement:
In arguing that high isotopic variance in tooth enamel does not conclusively prove long-distance regional immigration, the critics assume that pastoralists moving between geologically distinct micro-environments within the same local region would absorb varying strontium ratios into their tooth enamel during childhood development.

Passage:
In mid-nineteenth-century Britain, the implementation of limited liability laws for joint-stock companies was intended by proponents to democratize investment by encouraging small savers to fund speculative industrial enterprises without risking personal ruin. However, legal historians note that early limited liability entities rarely attracted small-scale retail investors. Instead, capital aggregation was dominated by affluent elites who utilized the statutory liability cap primarily to diversify existing portfolios across multiple high-risk ventures rather than risk total exposure in a single firm. Crucially, contemporary bankruptcy court records reveal that creditor protections, which previously allowed lenders to claim personal assets of partners in un-incorporated partnerships, were not replaced by mandated minimum capital requirements for limited liability firms until decades later. Consequently, creditors faced heightened default risks, prompting them to demand higher interest rates on corporate debt. This risk premium effectively offset the lowered cost of equity capital for emerging firms. Furthermore, while unlimited liability partnerships continued to operate in traditional sectors like private banking, their access to capital markets gradually contracted as investors increasingly favored limited liability options despite the higher borrowing costs borne by those firms.

Which of the following can be most logically inferred from the passage regarding British corporate finance during the mid-nineteenth century?

Passage:
Archaeologists studying Neolithic trade networks in the Western Mediterranean have long debated the mechanism by which Lipari obsidian was distributed across Sardinia and coastal Etruria between 5000 and 4000 BCE. Traditional models posited a directional 'down-the-line' gift exchange system, in which obsidian artifacts passed sequentially through adjacent coastal settlements, diminishing exponentially in quantity with distance from the Lipari source. Proponents of this model argued that uniform reductions in bladelet size and high proportions of unworked core fragments at inland sites reflected local, non-specialized knapping of scarce material acquired through casual barter.

However, recent compositional analyses of obsidian assemblages at several inland Etrurian sites challenge this view. Researchers found that while raw obsidian nodules were indeed rare in these inland communities, finished obsidian blades exhibited remarkably standardized width-to-thickness ratios identical to those recovered from primary maritime workshop sites near Lipari. Furthermore, microscopic microwear analysis revealed that inland blades were almost exclusively utilized for high-precision tasks such as leatherworking rather than general domestic cutting. Based on these findings, Dr. Aris Thorne asserts that Lipari obsidian was not dispersed through informal down-the-line exchange, but was instead distributed via specialized merchant maritime cabotage directly supplying inland elites who commissioned specialized tools.

Which of the following, if true, would most weaken Dr. Thorne's assertion regarding the distribution mechanism of Lipari obsidian?