LSAT Evaluate Questions With Answers Practice Questions with Answers

Critical reasoning on the Law School Admission Test requires identifying the specific piece of information that would most help determine the validity of an argument. LSAT Evaluate Questions With Answers focus on your ability to find a logical gap and select a question or statement that, depending on its answer, either strengthens or weakens the author's conclusion. These questions act as a bridge between LSAT Prep fundamentals and advanced logical analysis, testing whether you can spot the hidden assumptions that a speaker relies upon.

Concept Explanation

Evaluate the Argument questions ask you to identify the information that is most important to know in order to judge the success or failure of a given argument. These questions are unique because the correct answer choice is usually phrased as a question or a "whether or not" statement. To solve them effectively, you must first isolate the conclusion and the premises, then look for the logical flaw or missing link between them. A highly effective technique for these problems is the Variance Test: if you provide two opposite answers to the question in the choice (e.g., "Yes" and "No"), one answer should significantly strengthen the argument, while the other should significantly weaken it. If the argument's validity remains unchanged regardless of the answer, that choice is incorrect. This process is similar to analyzing reading comprehension passages where logical structure is paramount.

Solved Examples

1. Example 1: The Health Food Store
   Argument: A new health food store opened in town last month. Since then, the local pharmacy has reported a 20% drop in sales of over-the-counter cold medications. Therefore, residents are using health food supplements to prevent colds.
   Step-by-Step Solution:
   1. Identify the Conclusion: Residents are using supplements from the new store to prevent colds.
   2. Identify the Premise: Pharmacy sales of cold meds dropped by 20% after the store opened.
   3. Find the Gap: The argument assumes the drop in sales is caused by the new store, rather than another factor like a milder winter.
   4. Evaluate: The best question to ask is "Was the incidence of the common cold in the town lower this month than in the same month last year?" If yes, the argument is weakened; if no, it is strengthened.
2. Example 2: Corporate Productivity
   Argument: Company X implemented a new remote-work policy. Three months later, total output increased by 10%. Thus, remote work makes employees more productive.
   Step-by-Step Solution:
   1. Identify the Conclusion: Remote work increases productivity.
   2. Identify the Premise: Output rose after the policy change.
   3. Find the Gap: Did the company hire more people during those three months?
   4. Evaluate: Ask "Whether the total number of employees at Company X increased during the three-month period." If the staff doubled, a 10% output increase actually suggests lower individual productivity.
3. Example 3: Endangered Species
   Argument: The population of rare blue butterflies in the valley has doubled since the local factory closed. Clearly, the factory's emissions were the primary cause of the population decline.
   Step-by-Step Solution:
   1. Identify the Conclusion: Factory emissions caused the decline.
   2. Identify the Premise: Population rose after the factory closed.
   3. Find the Gap: Did something else change at the same time, like the weather or predator populations?
   4. Evaluate: Ask "Whether there was a significant decrease in the population of birds that prey on blue butterflies during the same period." This helps determine if the factory was truly the culprit.

Practice Questions

1. A local school district introduced a mandatory music program for all elementary students. Two years later, standardized math scores in the district rose by 15%. The school board concludes that music education improves mathematical reasoning.

Which of the following would be most useful to know in evaluating the board's conclusion?

2. Recent data shows that people who drink at least four cups of coffee a day have a lower risk of developing certain neurological disorders. Therefore, caffeine must have a protective effect on the human brain.

Which of the following would be most important to determine in evaluating the argument?

3. A city council decided to lower the speed limit on Main Street from 35 mph to 25 mph. In the following year, the number of traffic accidents on Main Street decreased by 30%. The council claims the lower speed limit is responsible for the increase in safety.

4. Many consumers prefer Brand A over Brand B because Brand A is marketed as "all-natural." However, both brands contain the exact same chemical preservatives. Thus, consumers are being misled by Brand A's advertising.

5. An archeologist found several clay pots in a coastal cave and concluded they were used for transporting fresh water. This conclusion is based on the fact that the pots were found near a natural spring.

6. Government officials argue that increasing the tax on cigarettes will reduce smoking rates. They point to a neighboring state where a tax hike was followed by a 10% decrease in cigarette sales.

7. A software company found that employees who take 15-minute breaks every two hours complete their tasks faster than those who take one long lunch break. The CEO concludes that frequent short breaks are the key to efficiency.

8. A study found that children who grow up with pets are less likely to develop allergies as adults. The researchers conclude that exposure to pet dander strengthens the developing immune system.

9. A retail chain noticed that stores with bright lighting have higher sales per square foot than stores with dim lighting. The management decides to upgrade all stores to bright lighting to boost profits.

10. Scientists observed that a certain species of fish migrates to warmer waters just before the onset of winter. They conclude that the fish are sensitive to changes in water temperature.

Answers & Explanations

1. Answer: Whether the school district also implemented a new math curriculum during the same two-year period.
If a new math curriculum was introduced, the rise in scores could be attributed to that rather than the music program. This addresses the "alternative cause" flaw often seen in logical reasoning tasks.

2. Answer: Whether people who are already at lower risk for neurological disorders are more likely to consume large amounts of coffee.
This tests for reverse causality. If healthy people naturally gravitate toward coffee, then coffee isn't the cause of the health; health is the cause of the coffee consumption.

3. Answer: Whether the total volume of traffic on Main Street decreased significantly after the speed limit was changed.
If fewer cars are driving on the road, the number of accidents would naturally drop regardless of the speed limit. Using an AI Question Generator can help you practice identifying these volume-based fallacies.

4. Answer: Whether Brand A's "all-natural" claim refers to ingredients other than the preservatives.
If all other ingredients in Brand A are natural while Brand B uses synthetic dyes, the claim might not be misleading, even if the preservatives are the same.

5. Answer: Whether the pots show traces of chemical residues associated with seawater or food storage.
Finding out what was actually inside the pots is more important than where they were found. If they contain salt residue, the "fresh water" theory is likely wrong.

6. Answer: Whether the neighboring state also launched a major anti-smoking public health campaign at the same time as the tax hike.
This identifies if the tax hike was the actual cause of the decrease or if it was the education campaign.

7. Answer: Whether the employees who take frequent breaks are assigned tasks that are inherently simpler or shorter.
If the tasks themselves are easier, the break schedule might be irrelevant to the speed of completion.

8. Answer: Whether parents who own pets are also more likely to engage in other behaviors that reduce allergy risks in children.
This looks for a confounding variable. Perhaps pet owners also live in rural areas with different environmental exposures that affect the immune system.

9. Answer: Whether the stores with bright lighting are located in higher-income neighborhoods than the stores with dim lighting.
If the bright stores are in wealthy areas, the higher sales might be due to customer spending power rather than the light bulbs. For more on localized data analysis, see text completion logic.

10. Answer: Whether the fish begin their migration based on the length of the day rather than the temperature of the water.
This evaluates the specific mechanism of the fish's sensitivity. If they react to light (photoperiod) rather than heat, the conclusion is incorrect.

Frequently Asked Questions

What is the difference between Evaluate and Weaken questions?

Weaken questions ask for a fact that makes the conclusion less likely, while Evaluate questions ask for a piece of information that could either strengthen or weaken the argument depending on the answer. You are looking for the "pivot point" of the logic.

How do I apply the Variance Test?

Pick an answer choice and test it with two extreme "answers," such as "Yes" and "No." If the "Yes" answer makes the argument much stronger and the "No" answer makes it much weaker, you have found the correct choice.

Are Evaluate questions common on the LSAT?

Evaluate questions are less frequent than Strengthen or Weaken questions, usually appearing only once or twice per exam. However, they are high-value because they test the same underlying skills as more common question types.

Can an Evaluate answer be a statement of fact?

While most Evaluate answers are phrased as questions or "whether" statements, they occasionally appear as statements that identify a relevant factor. The key is that the information provided must be essential for determining the argument's validity.

What are common traps in Evaluate questions?

Common traps include "out of scope" choices that ask about things irrelevant to the conclusion and "one-sided" choices that only strengthen the argument without providing a way to weaken it through a different answer. Always ensure the choice addresses the specific link between premise and conclusion.