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June 2007, Logical Reasoning 1, Question 15

The content provides an in-depth analysis of how to approach sufficient assumption questions on the GRE, focusing on identifying the necessary evidence to make a conclusion incontrovertibly true.
  • Sufficient assumption questions require adding a piece of evidence to the given information to prove the conclusion beyond doubt.
  • The first step involves breaking down the argument to distinguish the conclusion from the evidence.
  • Identifying the gap between the conclusion and the evidence is crucial for finding the right answer.
  • The correct answer closes the loophole between the annual need for different vaccines and the possibility of recurring virus strains.
  • Other options are dismissed based on their irrelevance or inability to address the specific gap identified in the argument.
Understanding Sufficient Assumption Questions
Identifying the Argument Structure
Closing the Loophole
Evaluating Answer Choices