LSAT Logic Games

A comprehensive introduction to LSAT Logic Games, focusing on core concepts, advanced strategies, and real-world applications.

Introduction to LSAT Logic GamesGame Types and SetupsMaking Deductions and Inferences
Conditional Logic and ContrapositivesAdvanced Diagramming TechniquesHandling Exceptions and Complex Rules
Applying Logic Games Skills to Law SchoolLogic Games in Everyday Problem SolvingCollaborative Logic and Team Challenges
Diagram First, Questions SecondSkip and Return on Tough Questions
Introduction to LSAT...Game Types and Setup...Making Deductions an...Conditional Logic an...Advanced Diagramming...Handling Exceptions ...Applying Logic Games...Logic Games in Every...Collaborative Logic ...Diagram First, Quest...Skip and Return on T...
Advanced Topics

Conditional Logic and Contrapositives

Mastering Conditional Statements

Many LSAT games use conditional logic, such as "If A is selected, then B is not." Understanding how to interpret and manipulate these statements is crucial.

Conditional Statements

  • "If X, then Y" (\( X \rightarrow Y \))
  • "If Y is not true, then X is not true" (contrapositive: \( eg Y \rightarrow eg X \))

Contrapositives

Always write the contrapositive of any conditional rule. It's logically equivalent and often easier to apply.

Common Mistakes

Don't reverse or negate incorrectly. Remember:

  • "If X, then Y" is not the same as "If Y, then X."

Applying in Games

Use arrows, symbols, or shorthand to keep track of these relationships in your diagram.

Key Formula

\[X \rightarrow Y\]

Examples

  • If a person goes to Paris, then they must not go to Rome (\( P \rightarrow eg R \)); so if someone is in Rome, they can't be in Paris (\( R \rightarrow eg P \)).

  • If team A is in group 1, then team B is in group 2; therefore, if B is not in group 2, A can't be in group 1.

In a Nutshell

Conditional logic and contrapositives unlock tough logic game rules.

Key Terms

Contrapositive
A logical statement formed by reversing and negating the original conditional.
Negation
The opposite of a statement (e.g., not X).
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Advanced Diagramming Techniques