Introduction to GMAT Critical Reasoning
GMAT Critical Reasoning (CR) questions test your ability to understand and analyze arguments. Three common question types are weaken, strengthen, and assumption. A practical way to approach these is the logic chain analysis method: map out the evidence (premises), the conclusion, and the logical gap in between. This technique helps you see where an argument is vulnerable or where it needs support.
Logic Chain Analysis: The Core Skill
The logic chain method involves breaking an argument into its components:
- Evidence: The facts or reasons provided.
- Conclusion: The claim the argument is trying to support.
- Assumption: An unstated idea that must be true for the evidence to lead to the conclusion.
By tracing the logical connection from evidence to conclusion, you can identify the weak point. In a weaken question, you attack that weak point. In a strengthen question, you defend it. In an assumption question, you make it explicit.
Applying the Method to Weaken Questions
A weaken question asks you to find the answer choice that most undermines the argument. Using logic chain analysis, you locate the assumption or the link and choose an option that breaks that link.
Example (illustrative):
- Evidence: A restaurant added a new menu item and saw higher sales that week.
- Conclusion: The new menu item caused the increase in sales.
- Assumption: No other factors, like the holiday weekend, contributed.
To weaken, you might cite a competing explanation: “The restaurant was featured on a popular TV show that week.” This directly challenges the causal link.
Applying the Method to Strengthen Questions
Strengthen questions ask you to support the argument. In the logic chain, you reinforce the link between evidence and conclusion, often by ruling out alternative explanations or providing additional supporting data.
Using the same example: To strengthen the causal claim, you might state: “Sales increased even though the restaurant offered no discounts and had no special events that week.” This makes the evidence more convincing.
Applying the Method to Assumption Questions
Assumption questions require you to identify a necessary, unstated premise. The correct answer is the one that, if false, would destroy the argument. Use the logic chain to ask: What must be true for the conclusion to follow from the evidence?
Continuing the example: The conclusion depends on the assumption that the restaurant’s sales increase was not due to a random fluctuation. If a random fluctuation could explain the increase, the argument fails. Thus, the assumption is: “The sales increase was not merely a random weekly variation.”
Conclusion
Mastering the logic chain method gives you a systematic way to tackle weaken, strengthen, and assumption questions. By mapping the evidence, conclusion, and gap, you can quickly identify the target of the answer choices. Practice this technique on actual GMAT questions to improve your accuracy and speed.
For further guidance on your study application journey, you may find the following checks useful:
- How to Verify a UK Study Abroad Agency: Choosing a Trustworthy Service Based on Your Background and Application Stage
- Choosing a UK Master’s Application Agency: A Checklist Based on Your Profile and Application Stage
- Improving Your GMAT Score: Tips for Critical Reasoning
These links are provided as additional resources; they are not part of the evidence for this article.