Chapter 1: Problem 15
Write truth tables for the statement forms in \(14-18\). $$ \sim(p \wedge q) \vee(p \vee q) $$
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Chapter 1: Problem 15
Write truth tables for the statement forms in \(14-18\). $$ \sim(p \wedge q) \vee(p \vee q) $$
These are the key concepts you need to understand to accurately answer the question.
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Use a truth table to prove the validity of modus tollens. $$ \begin{aligned} & p \rightarrow q \\ & \sim q \\ \therefore & \sim p \end{aligned} $$
In logic and in standard English, a double negative is equivalent to a positive. Is there any English usage in which a double positive is equivalent to a negative? Explain.
a. Show that the following statement forms are all logically equivalent. \(p \rightarrow q \vee r, \quad p \wedge \sim q \rightarrow r, \quad\) and \(\quad p \wedge \sim r \rightarrow q\) b. Use the logical equivalences established in part (a) to rewrite the following sentence in two different ways. (Assume that \(n\) represents a fixed integer.) If \(n\) is prime, then \(n\) is odd or \(n\) is 2 .
Add \(11111111_{2}+1_{2}\) and convert the result to decimal notation, to verify that \(11111111_{2}=\left(2^{8}-1\right)_{10}\).
Use truth tables to determine whether the argument forms in 6-10 are valid. Indicate which columns represent the premises and which represent the conclusion, and include a few words of explanation to support your answers. $$ \begin{aligned} & p \wedge q \rightarrow \sim r \\ & p \vee \sim q \\ & \sim q \rightarrow p \\ \therefore & \sim r \end{aligned} $$
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