If a valid argument is an instance of a certain argument form, then all other instances of that argument form are also valid arguments. True False QUESTION 16 You will win only if your opponent will not. is a substitution instance of p. True False QUESTION 17 You will win only if your opponent will not. is a substitution instance of p & q. True O False QUESTION 18 You will win only if your opponent will not. is a substitution instance of p>q. True False QUESTION 19