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June 2007, Logical Reasoning 1, Question 13

The content delves into the strategy for tackling sufficient assumption questions on the GRE, using a specific question about the recycling of aluminum cans to illustrate the process of identifying the conclusion, analyzing the evidence, and selecting the answer that closes any possible loopholes.
  • Sufficient assumption questions require an additional piece of evidence that, when combined with the given statements, conclusively proves the argument.
  • The conclusion in the example provided is that group M contains twice as many cans as group L, based on the recycling of aluminum.
  • Key evidence includes the uniformity of aluminum content in cans, the complete recycling of L's cans into M, and the negligible presence of materials other than aluminum in the cans.
  • The primary loophole concerns the efficiency of the recycling process and whether it affects the volume of aluminum recovered.
  • The correct answer choice (C) asserts that all aluminum is recovered in the recycling process, effectively proving the conclusion by eliminating the identified loophole.
Understanding Sufficient Assumption Questions
Identifying the Conclusion and Evidence
Analyzing the Evidence and Closing Loopholes
Selecting the Correct Answer