Chapter 1.5, Problem 20E

In Exercises $11-20$, use a truth table to determine the validity of the argument specified. If the argument is invalid, interpret the specific circumstances that cause it to be invalid.

the argument in Exercise 10

10. $\begin{array}{l}p:\text{It is warm-blooded}\text{.}\\ q:\text{It is a reptile}\text{.}\\ r:\text{It is Godzilla}\text{.}\end{array}\}Usethesesymbols.$

1. Being warm-blooded is sufficient for not being a reptile.
2. Godzilla is not warm-blooded.
Therefore, Godzilla is a reptile.