Math Problem Statement

Evaluate the truth value of the following logical expression: (p∨q)⇒¬p

Question 6Select one:

False

None of the above

All of the above

True

Solution

To evaluate the truth value of (pq)¬p(p \vee q) \Rightarrow \neg p, let's analyze it using truth values of pp and qq.

Step-by-Step Solution

  1. Expression Analysis:

    • (pq)(p \vee q) represents the logical "or" of pp and qq, which is true if at least one of pp or qq is true.
    • ¬p\neg p represents the negation of pp, which is true when pp is false.
  2. Implication Analysis:

    • The implication (pq)¬p(p \vee q) \Rightarrow \neg p will be true unless (pq)(p \vee q) is true and ¬p\neg p is false.
    • The implication is only false when the antecedent (pq)(p \vee q) is true and the consequent ¬p\neg p is false.
  3. Truth Table:

Let's construct a truth table to evaluate the expression for all possible values of pp and qq.

ppqqpqp \vee q¬p\neg p(pq)¬p(p \vee q) \Rightarrow \neg p
TTTFF
TFTFF
FTTTT
FFFTT
  1. Result:
    • The expression (pq)¬p(p \vee q) \Rightarrow \neg p is false when pp is true (whether qq is true or false).
    • Therefore, the truth value of the expression is False.

Answer

The correct answer is:

  • False

Would you like additional details or explanations?

Here are some related questions for practice:

  1. What is the truth value of (pq)p(p \wedge q) \Rightarrow p?
  2. Evaluate (pq)(¬q¬p)(p \Rightarrow q) \Rightarrow (\neg q \Rightarrow \neg p) using a truth table.
  3. Determine the truth value of ¬(pq)¬p\neg(p \vee q) \Rightarrow \neg p.
  4. For which values of pp and qq is (p¬q)(qp)(p \vee \neg q) \Rightarrow (q \Rightarrow p) true?
  5. Explain how the truth table changes when using an exclusive OR instead of inclusive OR.

Tip: For any implication (AB)(A \Rightarrow B), remember that it’s false only when AA is true, and BB is false.

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Math Problem Analysis

Mathematical Concepts

Propositional Logic
Logical Implication
Truth Table Analysis

Formulas

Implication (A ⇒ B) is true except when A is true and B is false
Negation ¬p

Theorems

Implication Truth Table

Suitable Grade Level

Grades 10-12