Free LSAT resources
Free law school admissions resources
Parallel flawed method of reasoning
(PF)
Parallel flawed method of reasoning
(PF)
Stems that tell us the stimulus will exhibit flawed reasoning, then ask us to identify the answer choice that preserves that flaw.
Avg. 1.0 per section
“The flawed reasoning in which one of the following is most closely parallel to the flawed reasoning in the argument above?”
12%
29%
33%
18%
Avg. difficulty: 3.4
Correct answer criteria
- An argument that most closely matches the flawed reasoning in the argument in the stimulus.
Key tactics
- Identify the conclusion and premises
- Try to identify why the argument is flawed - why doesn't the conclusion follow from the premises?
- Try to summarize the key elements of the premises and conclusion that you're looking to match in the correct answer
- Be ready for conditional logic, which is common on these questions
- Pay attention to the strength of language in the conclusion
Answer choice tips
- Remember that the correct answer is supposed to have the same flaw. So if the answer's argument is valid, it's not going to be correct
- If you're stuck on an answer, make sure to check whether the strength of the conclusion matches what we're looking for. (e.g., If the answer choice conclusion says "X will probably occur" but the stimulus conclusion said "X will occur" then this doesn't match and the answer is unlikely to be correct.) There are notable exceptions to this for Parallel Flaw questions, but eliminating based on strength of conclusion is still a good general rule of thumb
Alternate explanation
Analogy (LR)
Argument part
Bad authority
Causal chain
Causal mechanism
Causal reasoning
Circular reasoning
Conditional reasoning
Confusing sufficiency and necessity
Correlation
Diagram?
Directionally wrong
Eliminating options
Equivocation
Evaluate
Except (LR)
Failed alternate explanation
False dichotomy
Fighting the hypothetical
Fill in the blank
Flaw or descriptive weakening
Illusory inconsistency
Inference
Internal contradiction
Irrelevant corroboration
Kick it up
Lack of support v. false conclusion
Link assumption
Main conclusion or main point
Math
Mental state v. reality
Method of reasoning or descriptive
Miscellaneous (LR)
Misdirected response
Most strongly supported
Must be false
Must be true
Necessary assumption
Parallel flawed method of reasoning
Parallel method of reasoning
Part v. whole
Phenomenon-hypothesis (LR)
Plausibility
Point at issue: agree
Point at issue: disagree
Principle
PSA - find or complete the application
PSA - find the rule
Quantifier
Relative v. absolute
Resolve reconcile or explain
Rule-application
Sampling
Source attack
Strengthen
Sufficient assumption
Time
Unwarranted assumption
Value judgment
Weaken
Weighing factors
Analogy (RC)
Application
Art
Author’s attitude
Author’s perspective
Comparative
Critique or debate
Describe approach
Describe organization
Describe relationship
Except (RC)
Humanities
Implied
Law
Logical continuation
Main point
Meaning in context (of word, phrase, or idea)
Miscellaneous (RC)
Other’s perspective
Phenomenon-hypothesis (RC)
Principle or generalization
Problem-analysis
Purpose in context (of word, phrase, or idea)
Purpose of paragraph
Purpose of passage
Science
Single position
Spotlight
Stated
Structure
WSE (RC)