Can someone please help me with this math problem: Investigate the validity of the following argument.
All of the original Harry Potter books were written by J.K. Rowling.
Dirty Harry was not written by J.K. Rowling.
Conclusion: Dirty Harry is not an original Harry Potter book.
I also have to use a Venn diagram to show whether it's valid or invalid.
study the contrapositive.
If p→q, then ~q → ~p