Formal Logic

Summary
Understanding formal logic and conditional statements is crucial for tackling GRE exam questions that require logical deductions.
• Conditional statements are if-then statements and their logical equivalents, crucial for logical deductions on the GRE.
• It's essential to recognize that statements in the form of 'every' or 'all' are conditional statements and can be converted back to if-then form for analysis.
• The contrapositive (if not Q, then not P) of a true conditional statement (if P, then Q) is also true, and this concept is vital for solving GRE logic problems.
• Understanding and constructing the contrapositive is a key skill, especially when dealing with unfamiliar or fictional information in GRE questions.
• Practical examples and practice problems help illustrate how to apply these concepts to deduce correct conclusions from given statements.
Chapters
00:00
Introduction to Formal Logic
00:22
Understanding Conditional Statements
03:26
The Importance of the Contrapositive
04:35
Applying Logic to GRE Questions