Unit 1 · Logic and Proof

1.2Conditional Statements

Quick Answer

A conditional statement has the form "If p, then q." The hypothesis is p; the conclusion is q. A conditional is false only when the hypothesis is true and the conclusion is false.

Essential Question

What is the structure of a conditional statement, and when is a conditional considered false?

Learning Goals

  • 1Identify the hypothesis and conclusion of a conditional statement.
  • 2Write statements in if-then form.
  • 3Determine the truth value of a conditional.
  • 4Write the negation of a statement.

Key Vocabulary

Conditional statement

A statement in the form "If p, then q"; also written p → q.

Hypothesis

The "if" part (p) of a conditional statement.

Conclusion

The "then" part (q) of a conditional statement.

Negation

The opposite of a statement; if p is true, then ¬p is false.

Truth value

Whether a statement is true or false.

Full lesson content coming soon

Worked examples, guided practice problems, a workbook, quiz, and downloadable PDF resources will be added to this lesson in Phase 2. The learning goals and vocabulary above reflect the complete lesson scope.