June 2007, Logical Reasoning 2, Question 11
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PrepTest 123 (June 2007), LR2
Summary
The content provides an in-depth analysis of how to approach necessary assumption questions on the LSAT, using a specific question about mercury levels in fish as an example to illustrate the process of identifying assumptions that an argument critically depends on.
- Necessary assumption questions require identifying unstated premises that are essential for the argument's validity.
- Understanding the argument involves breaking it down into its conclusion and supporting evidence.
- The example used demonstrates that the argument's conclusion is based on a comparison of mercury levels in seabird feathers from the 1800s and today.
- Identifying assumptions involves considering what must be true for the evidence to support the conclusion effectively.
- The correct answer (E) is identified by eliminating options that either weaken the argument or are not essential to the argument's core claim.
Chapters
00:00
Understanding Necessary Assumptions
00:20
Breaking Down the Argument
01:08
Identifying Key Assumptions
01:56
Analyzing Answer Choices