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Practice Module 04

Flaw and Parallel Reasoning

Recognize recurring reasoning errors and match arguments by logical structure rather than by topic or vocabulary.

Diagnose

Name the flaw

Describe exactly what the argument does wrong without relying on memorized labels alone.

Abstract

Represent the structure

Reduce the argument to a simple pattern of evidence, assumption and conclusion.

Match

Preserve key features

Compare conclusion type, support type, certainty and logical validity.

What to master

  • Correlation and causation errors.
  • Necessary-sufficient confusion.
  • Unrepresentative samples.
  • Part-whole and group-individual errors.
  • Circular reasoning and false alternatives.
  • Parallel reasoning and parallel flaw.

BoardQBank strategy

1

Describe the flaw in your own words before reading choices.

2

For parallel tasks, identify the argument’s validity and conclusion strength.

3

Eliminate choices with a different logical direction even when the topic seems similar.

4

Use formal notation only when it makes comparison faster and clearer.

Practice focus

  • Flaw-description questions.
  • Parallel-reasoning questions.
  • Parallel-flaw questions.
  • Questions with several choices describing real but irrelevant concerns.

Continue your LSAT preparation

Move from concept review to targeted drills, timed sets and cumulative practice.

Next: Reading Comprehension