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# Describe what is meant by a valid argument in ISBN: 9780073383095 37

## Solution for problem 8RQ Chapter 1.R

Discrete Mathematics and Its Applications | 7th Edition

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Problem 8RQ

Describe what is meant by a valid argument in propositional logic and show that the argument If the earth is flat, then you can sail off the edge of the earth," "You cannot sail off the edge of the earth," therefore. "The earth is not flat" is a valid argument.

Step-by-Step Solution:

Step 1:

In this problem, we have shown that the given argument is valid.

Step 2:

For this condition, we can use the combining rules of inference for Propositions and Quantified statement

Universal Modus Ponens: )

P(a), where a is a specific element in the given domain

Therefore, Q(a) is true

Universal Modus Tollens: ) Q(a), where a is a specific element in the given domain

Therefore, P(a) is true

Step 3 of 3

##### ISBN: 9780073383095

Discrete Mathematics and Its Applications was written by and is associated to the ISBN: 9780073383095. The answer to “Describe what is meant by a valid argument in propositional logic and show that the argument If the earth is flat, then you can sail off the edge of the earth," "You cannot sail off the edge of the earth," therefore. "The earth is not flat" is a valid argument.” is broken down into a number of easy to follow steps, and 50 words. Since the solution to 8RQ from 1.R chapter was answered, more than 307 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Discrete Mathematics and Its Applications, edition: 7. The full step-by-step solution to problem: 8RQ from chapter: 1.R was answered by , our top Math solution expert on 06/21/17, 07:45AM. This full solution covers the following key subjects: EARTH, Argument, Flat, sail, edge. This expansive textbook survival guide covers 101 chapters, and 4221 solutions.

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