All practice questions

Last year, the city of Granchester reported a 15% increase in the absolute number of workplace injuries compared to the previous year. However, according to the city's labor department, the overall workplace injury rate—calculated as the number of injuries per 100,000 hours worked—actually decreased by 5% during the exact same period.

Which of the following statements, if true, help to resolve the apparent discrepancy described above? (Select all that apply.)

City official: We are planning to replace our current fleet of diesel public buses with electric buses to reduce the city's overall carbon footprint. Although manufacturing electric buses generates more carbon emissions than manufacturing diesel buses, electric buses produce zero emissions while operating. Therefore, completing this fleet replacement will successfully reduce our overall carbon footprint.

Which of the following statements are necessary assumptions required by the city official's argument? Select all that apply.

Political theorist: A democratic government is legitimate only if it governs with the consent of the governed. Recent independent surveys demonstrate that a majority of the citizens in the nation of Oakhaven strongly oppose the current government's sweeping economic reforms. Therefore, it is clear that the government of Oakhaven has lost its legitimacy.

Which one of the following, if assumed, allows the political theorist's conclusion to be properly drawn?

Examine the brief arguments provided below. Each argument exhibits a distinct logical flaw. Match each argument on the left with the abstract description that most accurately identifies its error in reasoning.

Analyze the logical structures of the following four excerpts from various disciplines. Which abstract description best identifies the logical flaw in each argument? Match each flawed argument to its corresponding reasoning error.

Ornithologist: The endangered Kakapo bird relies almost entirely on the fruit of the Rimu tree for breeding. In fact, Kakapos only attempt to breed during years when the Rimu tree produces a massive abundance of fruit, an event known as "mast seeding." Climate models predict that rising average temperatures will cause Rimu trees to mast seed every two years over the next century, rather than their historical average of once every five years. Therefore, the frequency of Kakapo breeding seasons will significantly increase over the next century.

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

To combat rising traffic congestion in its downtown business district, the city of Oakhaven recently doubled the frequency of its public bus service and reduced fares. Within three months, city officials noted that the total number of passenger cars entering the downtown district daily had decreased by 30 percent, as many commuters switched to taking the bus. Nevertheless, the average time it takes a vehicle to cross the downtown district during rush hour has significantly increased over the same period.

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

Neurobiologist: In a recent experiment, laboratory mice whose daily diets were supplemented with the artificial sweetener Zytrol performed significantly worse on spatial memory tasks than a group of mice whose diets were supplemented with an equal caloric amount of natural sucrose. Therefore, we can conclude that the consumption of Zytrol actively impairs spatial memory function.

Statement: The newly discovered fact that mice fed a standard baseline diet containing neither Zytrol nor sucrose performed identically on the spatial memory tasks to the mice fed Zytrol significantly weakens the neurobiologist's argument.

Policy Analyst: To combat congestion, the city of Oakhaven recently implemented a $10 toll for private vehicles entering the downtown business district during morning rush hour. Last month, which was the first month of the toll, the number of private vehicles entering the district during morning rush hour dropped by 30% compared to the previous month. Therefore, the financial cost of the toll must be what deterred these drivers from entering the district during morning rush hour.

Which of the following are necessary assumptions required by the policy analyst's argument?

Wellness Coach: Clients who consume a diet high in refined carbohydrates frequently experience a noticeable crash in their physical energy by mid-afternoon. Such physical exhaustion can hinder one's daily productivity. Therefore, if you wish to lead a life full of boundless energy, you must align your spiritual energy through mindful meditation each morning.

Determine whether the following statement accurately describes the logical flaw in the argument:

The reasoning in the wellness coach's argument is flawed because it presumes, without providing justification, that refined carbohydrates are the only cause of mid-afternoon exhaustion.

Securing a patent for a software algorithm necessitates that the source code resolves a unique technical problem rather than merely automating a known business practice. The newly developed 'Nexus' algorithm definitively solves a previously intractable technical bottleneck in data routing. Consequently, the Nexus algorithm will undoubtedly be granted a patent.

Which of the following arguments exhibits a flawed pattern of reasoning most similar to that exhibited by the argument above?

Nutritional Biochemist: The recently synthesized compound 'Z-Sweet' binds perfectly to the tongue's sweet-taste receptors but is entirely indigestible by human metabolic enzymes. Furthermore, longitudinal studies confirm that ingesting Z-Sweet fails to trigger the release of pancreatic insulin. Consequently, substituting dietary sugar with Z-Sweet will guarantee a reduction in overall body adiposity while permanently eliminating neurochemical sugar addiction.

Based on the biochemist's reasoning, which of the following statements act as required supporter assumptions that logically bridge gaps in the argument? Select all that apply.

Consider the following argument:

Art Historian: For an oil painting to be conclusively attributed to the Renaissance master Caravaggio, it must exhibit his signature use of chiaroscuro—a dramatic, high-contrast interplay between light and dark. The recently discovered painting *The Weeping Saint* clearly lacks this dramatic contrast, presenting instead a relatively uniform, flat illumination of its subject. Therefore, *The Weeping Saint* cannot possibly be the work of Caravaggio. Furthermore, since the painting is not a Caravaggio, its current auction reserve price of ten million dollars is entirely unjustified and must be reduced.

Evaluate whether the following statement accurately describes the logical flaw committed in the argument:
The art historian's reasoning is flawed primarily because it treats a characteristic that is required for a painting to be attributed to Caravaggio as a characteristic that is sufficient to guarantee that attribution.

Traditional histories of nineteenth-century art often depict the invention of photography as a catastrophic blow to painted portraiture, arguing that the camera's quick, inexpensive exactitude rendered painters obsolete. While it is true that painters specializing in realistic miniatures suffered economically, a closer examination reveals a reciprocal relationship between the two disciplines.

Rather than simply destroying the market for painted portraits, photography liberated painters from the burden of strict mimetic reproduction. Because photographs effortlessly captured precise physical details, many portrait painters shifted their focus toward capturing the psychological essence and inner emotional state of the sitter. This adaptation laid the groundwork for the subjective interpretations characterizing later art movements.

Conversely, early photographers did not operate in an aesthetic vacuum. To elevate their mechanical process to the status of fine art, photographers routinely adopted the compositional stances, classical backdrops, and dramatic lighting techniques perfected by centuries of painting. The camera provided the new technology, but painting provided the visual grammar.

Which one of the following most accurately expresses the main idea of the passage?

Botanist: For any plant species to survive in the highly arid dunes of the central desert, it must have a root system capable of reaching deep subterranean aquifers. The newly classified shrub Silene deserta possesses a remarkably extensive taproot system that has been proven to penetrate to the depth of these underground aquifers. Therefore, it is certain that Silene deserta is capable of surviving in the central desert's highly arid dunes.

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

A federal agency recently standardized its data security by implementing a new cryptographic protocol across all its regional branches. Prior to this standardization, branches that independently utilized this specific cryptographic protocol reported the lowest incidence of unauthorized data access within the agency. The new mandate replaced all other security systems with this protocol. A post-implementation review revealed that, although the overall volume of unauthorized data access incidents across the agency fell by 40 percent, the specific branches that had previously utilized the weakest security systems experienced a marked increase in unauthorized access incidents following the protocol's implementation.

Which one of the following most accurately describes the apparent discrepancy presented in the review's findings?

Art conservator: Traditional chemical solvents used to clean Renaissance oil paintings often seep through the protective varnish and interact directly with the underlying paint pigments. A new cleaning technique, thermal plasma descaling, exclusively removes the outer layer of grime without penetrating the varnish at all. Thus, museums can be assured that employing thermal plasma descaling will never alter the original color balance of these Renaissance paintings.

The art conservator's argument depends on which one of the following assumptions?

In a recent behavioral study, participants were divided into two groups and asked to solve a complex logic puzzle. Group A was offered a substantial financial reward if they completed the puzzle within one hour. Group B was offered no reward and was simply asked to try the puzzle for fun. Standard behavioral theories strongly predict that large financial incentives increase motivation, thereby leading to faster completion times on cognitive tasks. However, researchers recorded that a significantly higher percentage of participants in Group B successfully completed the puzzle within the hour compared to Group A.

Which one of the following most accurately describes the apparent discrepancy presented in the information above?

Sports psychologist: Any athlete who consistently practices mental imagery techniques experiences a significant reduction in pre-game anxiety. Furthermore, all athletes who experience a significant reduction in pre-game anxiety are able to maintain their concentration during the decisive moments of a competition. Thus, we can conclude that any athlete who consistently practices mental imagery techniques will achieve peak physical performance during tournaments.

Which one of the following is an assumption that, if true, allows the sports psychologist's conclusion to be properly drawn?

Any viable long-term strategy for space exploration requires international cooperation. Therefore, because the newly proposed Mars initiative has secured unprecedented levels of international cooperation, the initiative is guaranteed to be a viable long-term strategy for space exploration.

Which of the following arguments contains a flawed pattern of reasoning most similar to the one exhibited in the argument above?