GRE Prep: Argument Essay (Identifying Flaws, Logical Fallacies, Organizing Critique)

GRE – Argument Essay (Identifying Flaws, Logical Fallacies, Organizing Critique)

GRE Argument Essay – Study Guide
(Identifying Flaws, Logical Fallacies, Organizing a Critique)

What This Is

The GRE Argument Essay (also called “Analyze an Argument”) asks you to evaluate a short argument (usually 1–2 paragraphs) and write a 500‑word critique. You are not asked to take a position on the issue; instead you must pinpoint logical flaws, unsupported assumptions, or weak evidence and suggest how the argument could be strengthened. Mastery is essential because the essay counts toward your Analytical Writing score, and a well‑structured critique shows the same critical‑thinking skills tested in the Verbal Reasoning section.

Typical prompt example:

“The city council argues that installing more bike lanes will reduce traffic congestion because a recent study showed a 12 % drop in car traffic on streets where bike lanes were added.”

Your task: expose the hidden assumptions, evaluate the evidence, and propose a better line of reasoning.

Key Terms & Rules

• Argument vs. Issue – Argument: a set of premises leading to a conclusion; Issue: a statement you must take a stance on. The essay always deals with an Argument.
• Assumption (Unstated Premise) – A necessary piece of reasoning that the writer fails to state. Identifying it is the core of the critique.
• Logical Fallacy – An error in reasoning (e.g., post hoc ergo propter hoc, hasty generalization, false dichotomy). Spotting a fallacy often reveals the underlying assumption.
• Evidence Gap – When the argument provides data that does not directly support the conclusion (e.g., correlation ≠ causation).
• Counterexample – A concrete scenario that contradicts the argument’s claim; useful for showing why an assumption is weak.
• Strengthening the Argument – Suggesting additional data, a broader sample, or a different methodology that would make the conclusion more credible.
• Structure Blueprint – (1) Intro (paraphrase), (2) Body Paragraph 1 (assumption + why it’s questionable), (3) Body Paragraph 2 (another flaw or missing evidence), (4) Body Paragraph 3 (suggested improvement), (5) Conclusion (brief recap).
• Time Management Rule – Spend ≈ 5 min planning, ≈ 30 min writing, ≈ 5 min revising. The first 2–3 sentences of each paragraph should be topic‑sentence + evidence; avoid wandering sentences.
• Scoring Rubric Highlights – Score 4–5: clear identification of multiple assumptions, well‑organized critique, varied sentence structure. Score 1–2: vague or missing assumptions, disorganized, many grammatical errors.

Step‑by‑Step Process Flow

1. Read the Prompt Carefully (≈ 30 sec).
2. Highlight the conclusion (what the author wants you to accept).

3. Underline the premises (facts, statistics, examples).

4. Identify the Core Assumptions (≈ 2 min).

5. Ask: “What must be true for the conclusion to follow?”

6. Write a quick list of 2–3 assumptions; mark any that seem unsupported.

7. Spot Logical Fallacies / Evidence Gaps (≈ 2 min).

8. Look for common patterns: post‑hoc, circular reasoning, appeal to authority, over‑generalization.

9. Note where the evidence doesn’t directly address the conclusion.

10. Plan the Essay (≈ 1 min).

11. Use the Structure Blueprint: decide which assumption goes in Paragraph 1, which fallacy in Paragraph 2, and what improvement you’ll suggest in Paragraph 3.

12. Write the Essay (≈ 30 min).

13. Intro: Paraphrase the argument in 1‑2 sentences; state that the argument is flawed because of specific assumptions.
14. Body Paragraphs: Each starts with a clear topic sentence (“The argument assumes that…”) → explain why the assumption is weak → give a concrete counterexample or data gap → transition to next flaw.
15. Improvement Paragraph: Propose a specific study, additional data, or a revised premise that would make the argument stronger.

16. Conclusion: One sentence summarizing the main critique.

17. Proofread (≈ 5 min).

18. Check for subject‑verb agreement, parallel structure, and that each paragraph contains a topic sentence + evidence.

Common Mistakes

Exam Insights

1. Most‑Tested Flaw: Unstated Assumption – the GRE loves to hide the premise that “correlation equals causation.” Spot it early.
2. Distractor Pattern: The prompt may include a minor, irrelevant statistic to lure you into discussing it; stay focused on the central conclusion.
3. Logical‑Fallacy Frequency: Hasty Generalization and Post‑Hoc appear in > 60 % of Argument prompts. Recognizing the pattern speeds up assumption identification.
4. Scoring Nuance: Even if you identify only one solid assumption, you can still earn a 3 if the essay is well‑organized; aim for two to push into the 4‑5 range.

Quick Check Questions

1. Which of the following is the most likely hidden assumption in the argument below?

“Because the company’s sales increased 8 % after launching a new advertising campaign, the campaign must be responsible for the growth.”

A) The advertising campaign was the only change made that month.

B) Sales data are accurate.

C) Competitors did not change their prices.

D) Customers prefer the new product line.

E) The campaign reached at least 50 % of the target market.

Answer: A – The argument assumes no other factors (price changes, seasonal trends) could have caused the sales rise.

1. Identify the logical fallacy in this statement: “All the top‑ranked universities that use a pass/fail grading system have higher graduation rates, so pass/fail grading must cause higher graduation rates.”

Answer: Post hoc ergo propter hoc (assuming causation from correlation).

1. Which improvement would most strengthen the bike‑lane argument?

A) Adding a survey of driver attitudes toward cyclists.

B) Comparing traffic data from cities that added bike lanes and those that did not.

C) Reporting the cost of installing bike lanes.

D) Including a quote from the city mayor.

E) Showing a map of the new bike lanes.

Answer: B – A comparative study controls for other variables, directly testing the claim that bike lanes reduce congestion.

Last‑Minute Cram Sheet (10 One‑Liners)

1. ⚠️ Assumption = “must be true” for the conclusion to hold.
2. Post‑hoc fallacy = confusing correlation with causation.
3. Hasty generalization = drawing a broad claim from a tiny sample.
4. Structure Blueprint = Intro → 2–3 flaw paragraphs → improvement → brief recap.
5. Time rule: 5‑2‑30‑5 (Plan‑Read‑Write‑Proof).
6. Scoring tip: 2+ distinct assumptions + clear organization → 4‑5 score.
7. Counterexample = concrete scenario that disproves the hidden assumption.
8. Evidence gap = data that doesn’t directly support the conclusion.
9. Never add personal opinion; stay in the “critic” voice.
10. ⚠️ Trap: “Irrelevant statistic” – ignore numbers that don’t tie to the main claim.

Good luck—your ability to dissect arguments will pay off both in the Analytical Writing and Verbal Reasoning sections!