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June 2007, Logical Reasoning 2, Question 25

The content focuses on dissecting a flaw question within the GRE exam, specifically identifying and understanding the error in an argument's reasoning.
  • Flaw questions require recognizing the argument's conclusion, its supporting evidence, and how the evidence fails to substantiate the conclusion.
  • The example provided illustrates a common flaw: confusing necessity with sufficiency in arguments.
  • Understanding the argument involves tracing back to its initial claim and evaluating the evidence presented against it.
  • Formal logic can aid in distinguishing between disproving a claim of necessity versus a claim of sufficiency.
  • The correct answer choice directly addresses the flaw of confusing sufficiency with necessity, while other options are dismissed for various reasons.
Understanding Flaw Questions
Dissecting the Argument
Identifying the Flaw: Necessity vs. Sufficiency
Analyzing Answer Choices