Chapter 1: Problem 25
A conditional statement is not logically equivalent to its inverse.
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Chapter 1: Problem 25
A conditional statement is not logically equivalent to its inverse.
These are the key concepts you need to understand to accurately answer the question.
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Rewrite the statements in \(1-4\) in if-then form. Fix my ceiling or I won't pay my rent.
"Do you mean that you think you can find out the answer to it?" said the March Hare. "Exactly so," said Alice. "Then you should say what you mean," the March Hare went on. "I do," Alice hastily replied; "at least-at least I mean what I say - that's the same thing, you know." "Not the same thing a bit"" said the Hatter. "Why, you might just as well say that 'I see what I eat' is the same thing as 'I eat what I see'!" \- from "A Mad Tea-Party" in Alice in Wonderland, by Lewis Carroll The Hatter is right. "I say what I mean" is not the same thing as "I mean what I say." Rewrite each of these two sentences in if-then form and explain the logical relation between them. (This exercise is referred to in the introduction to Chapter 3.)
Let \(p\) be the statement "DATAENDFLAG is off,"' \(q\) the statement "ERROR equals 0 ," and \(r\) the statement "SUM is less than 1,000." Express the following sentences in symbolic notation. a. DATAENDFLAG is off, ERROR equals 0 , and SUM is less than \(1,000 .\) b. DATAENDFLAG is off but ERROR is not equal to \(0 .\) c. DATAENDFLAG is off; however ERROR is not 0 or SUM is greater than or equal to 1,000 . d. DATAENDFLAG is on and ERROR equals 0 but SUM is greater than or equal to 1,000 . e. Either DATAENDFLAG is on or it is the case that both ERROR equals 0 and SUM is less than 1,000 .
Sharky, a leader of the underworld, was killed by one of his own band of four henchmen. Detective Sharp interviewed the men and determined that all were lying except for one. He deduced who killed Sharky on the basis of the following statements: a. Socko: Lefty killed Sharky. b. Fats: Muscles didn't kill Sharky. c. Lefty: Muscles was shooting craps with Socko when Sharky was knocked off. d. Muscles: Lefty didn't kill Sharky. Who did kill Sharky?
Design a circuit to take input signals \(P, Q\), and \(R\) and output a 1 if, and only if, \(P\) and \(Q\) have the same value and \(Q\) and \(R\) have opposite values.
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