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: 34

Answer

The argument is invalid.

Work Step by Step

The argument is valid if and only if every possible diagram illustrates the argument’s decision. The diagram above shows that some A are D which negates the conclusion. Thus, the argument is invalid.
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