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Conditional reasoning
(CondR)
Conditional reasoning
(CondR)
Stimuli that feature conditional and set logic (e.g. A → B, A is true, therefore B is true).
Avg. 4.5 per section
15%
35%
28%
17%
Avg. difficulty: 3.4
Key tactics
- The Conditional reasoning tag applies to any stimulus that features conditional claims (e.g. if ___, then ____), or claims about sets (e.g. all cats are mammals).
- Flawed conditional reasoning is one of the most tested concepts on the LSAT, but many stimuli feature valid conditional reasoning patterns as well.
- Fluency in formal logic diagramming (we call our language "Lawgic") is immensely helpful, both in the learning process and on the test itself.
- Diagramming takes time to learn, and it's normal for it to feel slow or confusing at first. For most students, it's worth the investment because it builds a deeper understanding of conditional logic that pays off on test day.
Answer choice tips
- THE important thing to note about conditional claims is not to confuse a sufficient condition for a necessary condition. For example, consider the claim "All my friends are nerds":
- That claim does NOT mean "All nerds are my friends" nor does it mean "Anyone who is not my friend is not a nerd." Both of these claims confuse a sufficient condition for a necessary condition.
- Wrong answer will often try to tempt you to confuse a sufficient condition for a necessary condition.
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)