Weaken

Archaeologist: Excavations at the ancient settlement of Veridia have uncovered hundreds of specialized obsidian tools. Obsidian does not occur naturally anywhere near Veridia. The nearest known geological source of obsidian from that era is the Khalen mountain range, located over 500 miles away. Interestingly, other settlements surrounding Veridia from the same time period show absolutely no evidence of obsidian use. Clearly, the inhabitants of Veridia must have established a direct, exclusive trade route with the people living in the Khalen mountains.

Consider the following statement: Nomadic hunter-gatherer groups frequently traveled between the Khalen mountains and the Veridian region, bartering raw materials for food with isolated settlements along their migration paths.

The provided statement, if true, actively weakens the archaeologist's argument.

Match each argument on the left with the piece of counter-evidence on the right that most effectively weakens its conclusion.

Sociologist: A recent study of corporate professionals reveals a strong positive correlation between the number of hours an individual spends reading fiction per month and their demonstrated empathy in collaborative settings. Therefore, the habit of reading fiction directly enhances a person's capacity for empathy.

Evaluate the following statement as true or false:

The introduction of new data showing that professionals who spend comparable hours reading exclusively non-fiction literature do not exhibit these elevated levels of empathy actively weakens the sociologist's argument.

Marine biologist: Over the last decade, the population of the blue-crested penguin on Solara Island has dropped by 30 percent. During this same ten-year period, the number of commercial fishing vessels operating in the island's surrounding waters has doubled. The nets used by these vessels are known to frequently entangle and drown deep-diving seabirds. Therefore, the increase in commercial fishing must be the primary cause of the decline in the blue-crested penguin population.

Which one of the following, if true, most seriously weakens the marine biologist's argument?

Marine biologists studying the decline of coral reefs around the Tolman Islands have blamed the recent rise in local water temperatures. However, a new study shows that reefs surrounding the neighboring Banton Islands, which have experienced the exact same rise in water temperatures, are thriving and show no signs of decline. Therefore, it is clear that rising water temperatures are not the primary cause of the coral decline around the Tolman Islands.

Statement: The assertion that the coral species dominating the Banton Islands reefs possess a unique genetic adaptation making them highly resilient to temperature fluctuations—an adaptation absent in the coral species found around the Tolman Islands—actively weakens the argument above.

Agricultural researcher: A recent survey of farms in the drought-stricken Oakhaven region found that farms utilizing the newly developed MicroDrip irrigation system experienced, on average, a 25 percent lower rate of crop failure than farms using traditional overhead sprinklers. Since both systems draw water from the same dwindling regional reservoir, it is clear that the MicroDrip system delivers water to plant roots more efficiently than overhead sprinklers do.

Which of the following, if true, most seriously weakens the agricultural researcher's argument?

Paleontologist: Fossils of the extinct dire wolf are frequently found in the exact same sedimentary layers as the remains of large, herbivorous megafauna. Because dire wolves possessed exceptionally robust jaws and teeth capable of crushing thick bones, it is clear that they primarily hunted and brought down these large herbivores.

Statement: The paleontologist's argument is actively weakened by the newly discovered fact that the bone-crushing jaw structure of the dire wolf is anatomically identical to that of modern specialized scavengers, which feed exclusively on the abandoned carcasses of animals killed by other predators.

Below are four distinct arguments (left) and four potential pieces of counter-evidence (right). Identify which specific fact provides the strongest logical challenge to each argument's central conclusion.

Health Columnist: A recent study of 10,000 adults found that those who consistently read books before bed are 40% less likely to suffer from chronic insomnia compared to those who watch television before bed. Therefore, individuals who currently watch television before bed can significantly reduce their risk of developing chronic insomnia simply by replacing their evening television viewing with reading.

Which one of the following, if true, most seriously weakens the argument?

Read the following argument:

City Official: Six months ago, we doubled the fines for illegal parking in the downtown commercial district to reduce parking violations. Since the new fines took effect, the number of illegal parking citations issued by traffic enforcement in the district has decreased by 40%. This sharp decline demonstrates that the increased fines have successfully deterred drivers from parking illegally.

The introduction of the fact that 'Due to an ongoing infrastructure project, overall vehicle traffic entering the downtown commercial district has decreased by 50% over the past six months' actively weakens the city official's argument.

Management Consultant: A recent industry survey of logistics firms showed that those firms adopting centralized algorithmic routing software experienced a 20% reduction in average delivery times over the past year. In contrast, firms relying on traditional human dispatchers saw only a 5% reduction. Therefore, the transition to algorithmic routing software is directly responsible for the superior improvement in delivery efficiency among these firms.

Which of the following, if true, most seriously weakens the management consultant's argument?