Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 3 - Logic - 3.8 Arguments and Euler Diagrams - Exercise Set 3.8 - Page 204: 31

Answer

The argument is invalid.
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Work Step by Step

The argument is valid if and only if every possible diagram illustrates the argument’s decision some D are B .Since there are no D that are B , the argument is not valid.The argument is invalid.
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