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Essential Guide to LSAT Logical Reasoning

Feb 12, 2025

Mastering the LSAT Logical Reasoning Section

Importance of Logical Reasoning Section

  • Logical reasoning comprises half of the total LSAT score.
  • Two sections of logical reasoning, each with 25 questions and lasting 35 minutes.
  • Key focus area due to its significant weight on the test.

Key Components of Logical Reasoning Questions

  • Stimulus: The initial paragraph where information is presented.
  • Question Stem: Provides the task to accomplish for the correct answer.
  • Answer Choices: Five multiple-choice answers; task is to select the best answer.

Types of Logical Reasoning Questions

  1. Assumption Family (64%)

    • Evaluates argument strength.
    • Focus on identifying gaps/flaws in reasoning.
    • LSAT focuses on validity, not soundness.
    • Validity: Evidence proves the conclusion.
  2. Function Family (19%)

    • Measures ability to understand argument roles and purposes.
  3. Inference Family (24%)

    • Determines conclusions based on given statements.

Difficulty Levels in Logical Reasoning

  • Questions rated on a 1-5 difficulty scale.
  • Sections have unique difficulty curves, presenting challenges in different phases.
  • Reward systems implemented for difficult questions.
  • Sections can be divided into thirds: easiest, more challenging, and the hardest.

Strategies for Different Sections

  • First Third

    • Use intuition and everyday knowledge.
    • Avoid overanalyzing; rely on real-world understanding.
  • Middle Third

    • Continue using intuition but be wary of trap answers.
    • Understand common trap answer patterns.
  • Final Third

    • Use reasoning structures: conditional logic, causation, and comparison.
    • More complex topics; less relatable.
    • Employ trap answers for elimination.

Common Traps and Reasoning Structures

  • Trap Answers

    • Identify specific patterns: scope, logic, and degree.
  • Reasoning Structures

    • Conditional Logic (54%): Relationships using transitive property (If A then B).
    • Causation (34%): Stronger connections implying responsibility.
    • Comparison (65%): Comparative chains to determine conclusions (A < B < C).

Keys to Mastering Logical Reasoning

  1. Understanding Argument Structure

    • Identify conclusions and evidence.
    • Use keywords to organize arguments.
  2. Identifying Reasoning Structures

    • Recognize structures to find gaps.
  3. Using Trap Answer Patterns

    • Eliminate wrong answers effectively.

  • Explore additional resources and video lessons at LSAT Lab.