If a person is 18 years old, then the person can vote in the presidential election. Linda cannot vote; therefore, Linda is not 18 years old.
Determine if the statement is valid.
A.
No, p → q, therefore, q → p is an invalid argument.
B.
No, p → q, therefore, ~q → ~p is an invalid argument.
C.
Yes, p → q, therefore, ~q → ~p is a valid argument.
D.
There is not enough information to determine.
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