Problem 271
Suppose jack says that if the temperature is below 50°F , he won’t play tennis. Determine which of the following cases, if any , indicate that jack did not tell the truth:
a. The temperature was below 50° , and he did play tennis.
b.The temperature was below 50° , and he did play tennis.
c.The temperature was above 50° , and he didn’t play tennis.
d.The temperature was above 50° , and he did play tennis.
Solution
Option c.
The temperature was above 50° , and he didn’t play tennis.