Easy LSAT Complete the Argument Questions Practice Questions

Logical reasoning hinges on the ability to identify the natural conclusion of a premise-driven set of statements. Easy LSAT Complete the Argument Questions ask test-takers to supply the final piece of a logic chain that has been intentionally left blank, typically indicated by a line or a phrase like "it follows that." These questions assess your grasp of the LSAT Prep fundamentals, specifically how well you can predict the most supported inference based solely on the provided information.

Success in this category requires strict adherence to the text. Unlike other question types that might ask you to strengthen or weaken a claim, these items require you to find the missing conclusion that the author has already set the stage for. By focusing on the logical structure rather than outside knowledge, you can efficiently narrow down the options to the one that completes the thought process without overstepping.

Concept Explanation

LSAT Complete the Argument questions are logical reasoning tasks where you must select the response that most logically completes the passage's concluding sentence. These questions are essentially "inference" tasks in disguise; the correct answer is the statement that is most strongly supported by the preceding premises. To solve them, you must identify the direction of the author's logic and choose an option that fulfills the expectations set by the transition words used (such as "therefore," "however," or "thus").

Common characteristics of these questions include:

• The Blank: A literal blank line at the end of the stimulus.
• Logical Direction: The passage builds a case that points toward a specific, unavoidable point.
• Strict Scope: The correct answer will not introduce new, external information but will instead synthesize the existing premises.

When approaching these, look for the "logical gap." If the author says $A \rightarrow B$ and $B \rightarrow C$, the blank is likely looking for $A \rightarrow C$. Understanding how to link these variables is a core component of GRE Prep and LSAT study alike, as both exams value deductive validity.

Solved Examples

Review these examples to understand how to bridge the gap between premises and the final conclusion.

1. Scenario: All mammals are warm-blooded. A platypus is a mammal. Therefore, ________.
   Step-by-Step Solution:
   1. Identify the first premise: All mammals have the property of being warm-blooded.
   2. Identify the second premise: The platypus belongs to the category of mammals.
   3. Apply the transitive property: Since the platypus is a mammal, and all mammals are warm-blooded, the platypus must be warm-blooded.
   4. Correct Answer: The platypus is warm-blooded.
2. Scenario: If it rains, the grass will be wet. The grass is currently dry. Thus, ________.
   Step-by-Step Solution:
   1. Identify the conditional: $\text{Rain} \rightarrow \text{Wet Grass}$.
   2. Identify the fact: $eg \text{Wet Grass}$ (The grass is not wet).
   3. Apply Modus Tollens: If the result of the condition is false, the condition itself must be false ($eg \text{Wet Grass} \rightarrow eg \text{Rain}$).
   4. Correct Answer: It is not raining.
3. Scenario: Most residents of Oakville own bicycles. Sarah is a resident of Oakville. However, Sarah does not like outdoor activities. Therefore, it cannot be concluded that ________.
   Step-by-Step Solution:
   1. Identify the general trend: Most Oakville residents own bikes.
   2. Identify the specific case: Sarah lives in Oakville.
   3. Identify the counter-indicator: Sarah dislikes the outdoors (which might suggest she doesn't use a bike).
   4. Determine the logical limit: While most residents own bikes, "most" does not mean "all." Therefore, we cannot be 100% certain Sarah owns one.
   5. Correct Answer: Sarah definitely owns a bicycle.

Practice Questions

Test your skills with these Easy LSAT Complete the Argument Questions. Focus on finding the answer that follows directly from the premises.

1. Every student who studied for the exam passed. Mark is a student who did not pass the exam. Therefore, ________.

2. To get a driver's license, one must pass the vision test. Jessica failed the vision test yesterday. It follows that ________.

3. High-fiber diets generally improve digestion. Most people in the study who ate high-fiber diets reported fewer stomach issues. However, some participants in the high-fiber group reported no change. This suggests that a high-fiber diet ________.

4. All successful novelists have a disciplined writing routine. Henry is a successful novelist. Thus, ________.

5. If the company's profits increase by 10%, all employees will receive a bonus. The company's profits increased by 12% this year. Therefore, ________.

6. No one who is afraid of heights should go skydiving. Leo is afraid of heights. Consequently, ________.

7. Most plants require sunlight to grow. The ghost pipe plant, however, contains no chlorophyll and survives by taking nutrients from fungi. This shows that ________.

8. If the alarm sounds, the building must be evacuated. The building was not evacuated. Thus, ________.

9. Any city with a population over one million must have a public transit system. City X does not have a public transit system. It follows that ________.

10. Only members of the club are allowed to vote in the election. Sarah is not a member of the club. Therefore, ________.

Answers & Explanations

1. Answer: Mark did not study for the exam.
   Explanation: The premise states that studying is a sufficient condition for passing ($\text{Study} \rightarrow \text{Pass}$). Since Mark did not pass, the contrapositive ($eg \text{Pass} \rightarrow eg \text{Study}$) dictates he did not study.
2. Answer: Jessica cannot get a driver's license yet.
   Explanation: Passing the vision test is a necessary condition for the license. Since Jessica failed the necessary condition, she cannot achieve the result.
3. Answer: does not guarantee improved digestion for everyone.
   Explanation: The word "most" indicates a majority, but the mention of participants with "no change" proves the effect is not universal.
4. Answer: Henry has a disciplined writing routine.
   Explanation: This is a straightforward application of a general rule to a specific individual who fits the criteria.
5. Answer: all employees will receive a bonus.
   Explanation: Since 12% is greater than the 10% threshold required, the condition for the bonus has been met.
6. Answer: Leo should not go skydiving.
   Explanation: The argument establishes a rule for anyone afraid of heights; Leo fits that category, so the rule applies to him.
7. Answer: not all plants require sunlight to grow.
   Explanation: The ghost pipe plant serves as a counterexample to the general rule that "most" plants need sunlight.
8. Answer: the alarm did not sound.
   Explanation: If the alarm ($A$) requires evacuation ($E$), and no evacuation occurred ($eg E$), then the alarm could not have sounded ($eg A$).
9. Answer: City X does not have a population over one million.
   Explanation: A population over one million is a sufficient condition for a transit system. The absence of the system proves the population is below the threshold.
10. Answer: Sarah is not allowed to vote in the election.
    Explanation: Membership is a necessary condition for voting. Sarah lacks the necessary condition, so she is excluded from the activity.

Frequently Asked Questions

How do Complete the Argument questions differ from Must Be True questions?

While both require you to find a supported statement, Complete the Argument questions specifically ask for the "missing piece" that finishes the flow of the passage. They are often more focused on the structural conclusion rather than just any valid inference.

What should I do if two answers seem logically possible?

Re-read the transition words at the end of the stimulus, such as "therefore" or "but." Choose the answer that best fits the tone and logical direction established by those specific connectors.

Are these questions common on the LSAT?

Yes, they appear regularly in the Logical Reasoning section, though they may be less frequent than "Strengthen" or "Flaw" questions. They are considered foundational for understanding logical flow.

Can I use an AI Exam Simulator to practice these?

Absolutely, using modern tools can help you generate similar logical structures to sharpen your ability to spot valid conclusions quickly. You can also use an AI Question Generator to create custom drills for specific logic patterns.

Should I look for the conclusion in the stimulus?

No, in these specific questions, the conclusion is missing. Your job is to act as the author and provide the conclusion that the premises have already built toward.

What is the "scope" of an argument?

Scope refers to the specific range of topics and limits defined by the premises. An answer that is "out of scope" discusses things the author never mentioned, which is a common trap in reading exam questions and LSAT logic.