Thinking Mathematically (6th Edition)

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

Chapter 3 - Logic - 3.7 Arguments and Truth Tables - Exercise Set 3.7 - Page 190: 17


Use letters to represent each simple statement in the argument. p: There is a dam. q:There is flooding. Express the premises and conclusion symbolically as \[\frac{\begin{align} & p\vee q \\ & q \\ \end{align}}{\therefore \sim p}\ \ \ \ \ \ \frac{\begin{align} & \text{There must be a dam or there is flooding}\text{.} \\ & \text{This year there is flooding}\text{.} \\ \end{align}}{\therefore \text{This year there is no dam}\text{.}}\] The argument is in the form of “misuse of disjunctive reasoning.” So, the argument is invalid.
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